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Longman Dictionary of Contemporary English
▪ Concurrently hepatitis delta virus superinfection did not appear to modulate the synthesis and expression of pre-S peptides in the liver.
▪ A main feeder lava tunnel often branches towards the terminus of a flow rather like the distributaries of a river delta.
▪ Sediment from the tailings has increased the area of the river delta from 65 to 900 hectares.
▪ the Mississippi delta
▪ From these we get our word alphabet, delta, and gamma which gives us gamma rays.
▪ He too migrated to Cairo to find a job, in his case from a village in the Nile delta.
▪ Left: Typical of the rigid frame using glass fibre tubing on the earlier steerable deltas is seen on this example.
▪ They are called delta frames and, typically, may consist of no more than 5 kilobytes of data.
▪ They change the angle of attack from acute within the central delta, to near neutral over the outer triangular sail panel.
▪ This allows him to supervise all the family's vast landholdings in the delta.
▪ Tom Pratt's stack of four deltas lofts his Pentax unit.
The Collaborative International Dictionary

Delta \Del"ta\, n.; pl. Deltas. [Gr. de`lta, the name of the fourth letter of the Greek alphabet (the capital form of which is [Delta], Eng. D), from the Ph[oe]nician name of the corresponding letter. The Greeks called the alluvial deposit at the mouth of the Nile, from its shape, the Delta of the Nile.]

  1. The fourth letter of the Greek alphabet ([Delta] [delta]), corresponding to D. Hence, an object having the shape of the capital [Delta].

  2. A tract of land shaped like the letter delta ([Delta]), especially when the land is alluvial and inclosed between two or more mouths of a river; as, the delta of the Ganges, of the Nile, or of the Mississippi.

  3. (Elec.) The closed figure produced by connecting three coils or circuits successively, end for end, esp. in a three-phase system; -- often used attributively, as delta winding, delta connection (which see), etc.

Douglas Harper's Etymology Dictionary

c.1200, Greek letter shaped like a triangle, equivalent to our "D," the name from Phoenician daleth "tent door." Herodotus used it of the mouth of the Nile, and it was so used in English from 1550s; applied to other river mouths from 1790.


n. 1 The fourth letter of the modern Greek alphabet ''Δ'', ''δ''. 2 A landform at the mouth of a river where it empties into a body of water. 3 The letter ''D'' in the ICAO spelling alphabet, which assigns words to letters of the alphabet. 4 (context mathematics English) The symbol ''Δ''. 5 (context computing informal English) A small but noticeable effect. Compare (term epsilon English). 6 (context computing English) The set of differences between two versions of a file. 7 (context surveying English) The angle subtended at the center of a circular arc. 8 A type of cargo bike that has one wheel in front and two in back. 9 (context electrical often attributive English) The closed figure produced by connecting three coils or circuits successively, end for end, especially in a three-phase system.

  1. n. a low triangular area where a river divides before entering a larger body of water

  2. the 4th letter of the Greek alphabet

Delta, CO -- U.S. city in Colorado
Population (2000): 6400
Housing Units (2000): 2749
Land area (2000): 5.318651 sq. miles (13.775241 sq. km)
Water area (2000): 0.201126 sq. miles (0.520914 sq. km)
Total area (2000): 5.519777 sq. miles (14.296155 sq. km)
FIPS code: 19850
Located within: Colorado (CO), FIPS 08
Location: 38.740879 N, 108.063423 W
ZIP Codes (1990): 81416
Note: some ZIP codes may be omitted esp. for suburbs.
Delta, CO
Delta, OH -- U.S. village in Ohio
Population (2000): 2930
Housing Units (2000): 1193
Land area (2000): 2.600604 sq. miles (6.735532 sq. km)
Water area (2000): 0.000000 sq. miles (0.000000 sq. km)
Total area (2000): 2.600604 sq. miles (6.735532 sq. km)
FIPS code: 21616
Located within: Ohio (OH), FIPS 39
Location: 41.575090 N, 84.002477 W
ZIP Codes (1990): 43515
Note: some ZIP codes may be omitted esp. for suburbs.
Delta, OH
Delta, PA -- U.S. borough in Pennsylvania
Population (2000): 741
Housing Units (2000): 324
Land area (2000): 0.266230 sq. miles (0.689533 sq. km)
Water area (2000): 0.000000 sq. miles (0.000000 sq. km)
Total area (2000): 0.266230 sq. miles (0.689533 sq. km)
FIPS code: 18800
Located within: Pennsylvania (PA), FIPS 42
Location: 39.727207 N, 76.325668 W
ZIP Codes (1990): 17314
Note: some ZIP codes may be omitted esp. for suburbs.
Delta, PA
Delta, IA -- U.S. city in Iowa
Population (2000): 410
Housing Units (2000): 191
Land area (2000): 0.998534 sq. miles (2.586190 sq. km)
Water area (2000): 0.000000 sq. miles (0.000000 sq. km)
Total area (2000): 0.998534 sq. miles (2.586190 sq. km)
FIPS code: 19855
Located within: Iowa (IA), FIPS 19
Location: 41.324112 N, 92.329481 W
ZIP Codes (1990): 52550
Note: some ZIP codes may be omitted esp. for suburbs.
Delta, IA
Delta, LA -- U.S. village in Louisiana
Population (2000): 239
Housing Units (2000): 111
Land area (2000): 2.978267 sq. miles (7.713676 sq. km)
Water area (2000): 0.145765 sq. miles (0.377530 sq. km)
Total area (2000): 3.124032 sq. miles (8.091206 sq. km)
FIPS code: 20330
Located within: Louisiana (LA), FIPS 22
Location: 32.321342 N, 90.936544 W
ZIP Codes (1990):
Note: some ZIP codes may be omitted esp. for suburbs.
Delta, LA
Delta, UT -- U.S. city in Utah
Population (2000): 3209
Housing Units (2000): 1106
Land area (2000): 3.151247 sq. miles (8.161691 sq. km)
Water area (2000): 0.000000 sq. miles (0.000000 sq. km)
Total area (2000): 3.151247 sq. miles (8.161691 sq. km)
FIPS code: 18910
Located within: Utah (UT), FIPS 49
Location: 39.353145 N, 112.573656 W
ZIP Codes (1990): 84624
Note: some ZIP codes may be omitted esp. for suburbs.
Delta, UT
Delta, MO -- U.S. city in Missouri
Population (2000): 517
Housing Units (2000): 222
Land area (2000): 0.440008 sq. miles (1.139616 sq. km)
Water area (2000): 0.000000 sq. miles (0.000000 sq. km)
Total area (2000): 0.440008 sq. miles (1.139616 sq. km)
FIPS code: 19072
Located within: Missouri (MO), FIPS 29
Location: 37.197371 N, 89.738757 W
ZIP Codes (1990): 63744
Note: some ZIP codes may be omitted esp. for suburbs.
Delta, MO
Delta -- U.S. County in Michigan
Population (2000): 38520
Housing Units (2000): 19223
Land area (2000): 1170.025159 sq. miles (3030.351121 sq. km)
Water area (2000): 821.558454 sq. miles (2127.826538 sq. km)
Total area (2000): 1991.583613 sq. miles (5158.177659 sq. km)
Located within: Michigan (MI), FIPS 26
Location: 45.877369 N, 86.946619 W
Delta, MI
Delta County
Delta County, MI
Delta -- U.S. County in Texas
Population (2000): 5327
Housing Units (2000): 2410
Land area (2000): 277.075228 sq. miles (717.621515 sq. km)
Water area (2000): 0.841580 sq. miles (2.179681 sq. km)
Total area (2000): 277.916808 sq. miles (719.801196 sq. km)
Located within: Texas (TX), FIPS 48
Location: 33.388817 N, 95.710045 W
Delta, TX
Delta County
Delta County, TX
Delta -- U.S. County in Colorado
Population (2000): 27834
Housing Units (2000): 12374
Land area (2000): 1142.106394 sq. miles (2958.041854 sq. km)
Water area (2000): 6.416581 sq. miles (16.618868 sq. km)
Total area (2000): 1148.522975 sq. miles (2974.660722 sq. km)
Located within: Colorado (CO), FIPS 08
Location: 38.814325 N, 107.911736 W
Delta, CO
Delta County
Delta County, CO
Delta (letter)

Delta (uppercase Δ, lowercase δ or ????; Délta; Modern Greek ) is the fourth letter of the Greek alphabet. In the system of Greek numerals it has a value of 4. It was derived from the Phoenician letter dalet . Letters that come from delta include Latin D and Cyrillic Д.

A river delta (originally, the Nile River delta) is so named because its shape approximates the upper-case letter delta (the shape is a triangle). Despite a popular legend, this use of the word delta was not coined by Herodotus.

Delta (electoral district)

Delta is a federal electoral district in British Columbia, Canada, that was represented in the House of Commons of Canada from 1988 to 1997 and since 2015.

Delta (video game)

Delta is a horizontally scrolling shooter computer game originally released for the Commodore 64 by Thalamus Ltd in 1987. It was programmed by Stavros Fasoulas and the music was written by Rob Hubbard. The menu-music is based on the theme of Koyaanisqatsi by Philip Glass and the in-game-music is based on Pink Floyd's On the Run. The game was also released for the ZX Spectrum in 1990 as Delta Charge.

The game was released as Delta Patrol in the United States by Electronic Arts for its Amazing Software line of action-oriented software programs, in 1987 on the Commodore 64.

The player controls a spaceship and gains power-up points by destroying formations of enemies. Some enemy formations instead subtract power-up points for the player, so the player must take note of which formations to destroy. Periodically blocks containing the power-ups (higher speed, faster rate of fire) appear and the player can pick one of them up: The more points the player has collected, the more powerful are the power-ups that can be chosen. Unavailable power-ups are gray and kill the player if he flies into them, making them part of the obstacles in the game. The effects of the power-ups are lost over time and must therefore be regained. The player gets a choice between in-game music or in-game sound effects. There is also a high score table but no way to save it when the game is turned off.

The game title music was covered by Desert Planet in their 2003 album Joystick Pop.

Delta (provincial electoral district)

Delta was the name of a provincial electoral district in the Canadian province of British Columbia based on the municipality of Delta at the mouth of the Fraser River between the city of Vancouver and the US border. It made its first appearance on the hustings in the election of 1903 and its last in the election of 1986, after which it was succeeded by Delta North and Delta South, which are the current ridings in the area.

DELTA (taxonomy)

DELTA (DEscription Language for TAxonomy) is a data format used in taxonomy for recording descriptions of living things. It is designed for computer processing, allowing the generation of identification keys, diagnosis, etc.

It is widely accepted as a standard, one of only a few such standards. Quite a bit of software is available for various tasks, using this format. There is a website on DELTA, linking to many databases in this format.

It was devised by the CSIRO Australian Division of Entomology in 1971 to 2000, with a notable part taken by Dr. Michael J. Dallwitz.

Delta (TV series)

Delta is an American sitcom starring Delta Burke which aired on ABC from September 15, 1992 to August 25, 1993. The series was a new starring vehicle for Burke, as her return to television following her dismissal from the CBS sitcom Designing Women in the spring of 1991.


Delta commonly refers to:

  • Delta (letter) (Δ or δ), a letter of the Greek alphabet
  • River delta, a landform at the mouth of a river
  • Delta Air Lines, a United States airline

Delta may also refer to:

Delta (Diploma in Teaching English to Speakers of Other Languages)

Delta (Diploma in Teaching English to Speakers of Other Languages) is an English language teaching (ELT) qualification for experienced Teachers of English as a Foreign Language (TEFL) and Teachers of English to Speakers of Other Languages (TESOL). It is provided by Cambridge English Language Assessment through authorised Cambridge English Teaching Qualification centres and can be taken either full-time or part-time.

Delta is designed for candidates with previous English language teaching experience. Candidates have usually completed an initial teaching qualification and typically have at least one year’s teaching experience. It is suitable for first language and non-first language speakers of English who are teaching English as a second or foreign language (ESL and EFL) in primary, secondary and adult contexts. Candidates should have English language skills equivalent to at least level C1 of the Common European Framework of Reference for Languages.

Delta consists of three modules, which can be taken together or separately, in any order, and over any time period. Module Two requires course attendance at an authorised Delta centre so that teaching practice can be supported and assessed. There is no requirement to take a course at a recognised Delta centre for Modules One and Three, although most candidates do. Successful candidates receive a certificate for each module passed, as well as an overall certificate upon the successful completion of all three modules.

All three modules emphasise both theory and practice, although teaching practice is only directly assessed in Module Two. Delta also gives teachers an opportunity to pursue areas of specialism in Module Three (an extended assignment on syllabus design, course planning and assessment in the context of a selected ELT specialist area, or an extended assignment on ELT management in the context of a selected management specialist area).

Delta is designed to help candidates to develop as teachers and progress to new career opportunities. It is regulated at Level 7 of the Qualifications and Credit Framework for England, Wales and N. Ireland and is suitable for teachers at Developing or Proficient level on the Cambridge English Teaching Framework.

Delta (video album)

Delta is a DVD by Australian singer-songwriter Delta Goodrem. It was released on 13 October 2003 through Sony. In some international markets it was titled Innocent Eyes. The DVD features a collection of highlights documenting the Innocent Eyes era. It spent eight weeks at #1 and has become the highest selling music DVD in Australia by an Australian artist, being certified platinum twelve times. It was awarded "Best Music DVD" at the 3rd Annual Australian DVD Awards.

Delta (Delta Goodrem album)

Delta is the third studio album by Australian singer Delta Goodrem. It was released in Australia on 20 October 2007 through Sony BMG. Goodrem began work on the album in 2006 and collaborated with several writers including Vince Pizzinga, Tommy Lee James, Jörgen Elofsson, Richard Marx, Stuart Crichton and major contributions by Brian McFadden. The album debuted at No. 1 in Australia, making it her third consecutive chart-topping album there. The album was also released in the United States, by Mercury Records, making it Goodrem's first album to be released there.

Delta (magazine)

delta was a small poetry magazine that was produced at the University of Cambridge in the 1950s and 1960s. The magazine was first published in 1954. It was originally edited by Peter Redgrove and Rodney Banister, but Redgrove persuaded Philip Hobsbaum to take over from Issue 3. The magazine introduced various poets, including The Group figures Edward Lucie-Smith and Peter Porter.

Delta (wasp)

Delta is an Old World genus of potter wasps with species predominantly distributed through tropical Africa and Asia. Some species are present in the Palearctic region, and a few have been introduced in the Nearctic and Neotropical regions. The members of this genus have a long metasomal petiole, like members of the genera Eumenes and Zeta.

Delta (Visions of Atlantis album)

Delta is the fourth full-length album by Austrian Symphonic power metal band Visions of Atlantis featuring the new vocalist Maxi Nil. It was released on February 25, 2011.

Delta (horse)

Delta (1946−1960) was a champion Australian thoroughbred racehorse who won a number of top level races including the 1949 VRC Derby, 1949 Cox Plate and the 1951 Melbourne Cup.

Purchased by owner Adolph Basser for £2,665 at the 1948 Sydney yearling sales he was trained by former jockey and successful trainer Maurice McCarten.

He died at Widden Stud in 1960.

Delta (Australian TV series)

Delta is a 1969 Australian TV series about a scientific laboratory.

Delta (2008 film)

Delta (also called "Delta" in the original language) is a 2008 Hungarian drama film directed by Kornél Mundruczó and starring violinist Félix Lajkó in a non-musical acting role and actress Orsi Tóth. Supporting cast include Sándor Gáspár as the stepfather, Lili Monori as the mother, Sándor Fábián as the uncle, Tamás Polgár as the village boy.

Delta won the 2008 Golden Reel at Hungarian Film Week.

Delta (wrestler)

Delta (born August 27, 1985) is a Mexican Luchador enmascarado, or masked professional wrestler currently working for the Mexico City based professional wrestling promotion Consejo Mundial de Lucha Libre (CMLL). Delta's real name is not a matter of public record, as is often the case with masked wrestlers in Mexico where their private lives are kept a secret from the wrestling fans. Delta is the son of wrestler Trueno and previously wrestled as Hijo del Trueno ("Son of Thunder"), his brother currently works for CMLL wrestling under the ring name Trueno like their father, although the family relationship has not been publicly acknowledged by CMLL.

Usage examples of "delta".

The delta of the Rio Colorado has always been tricky for to navigate, and they tell me that lately, since your Anglo settlers have been drawing irrigation water from its tributaries, it has gotten worse.

Brahmaputra delta and the green hills of Assam and up over the dark mountain ridges of Burma into Lashio.

Momus, south of the Town of Tarzak, lies the village of Sina nestled between the Fake Foot river delta and the glittering expanses of the Sea of Baraboo, named in honor of the ship that stranded the original circus on Momus two centuries before.

In consequence we modified our view of the immediate future, decided to push on to Benghazi, and meanwhile to build up the strongest strategic reserve possible in the Delta.

You should, therefore, make yourself secure in Benghazi and concentrate all available forces in the Delta in preparation for movement to Europe.

The ostensible reason for their visit was to study and photograph the animals and birdlife of the delta or to troll for the glittering striped tigerfish that shoaled in the waterways.

Egypt than to Alexandria, isolated to the west of the Canopic Nilus, the westernmost arm of the Delta.

Passing through the Canopic Gate scant hours before the mob stormed the palace, they boarded a small barge at the town of Schedia, where the canal from Lake Mareotis behind Alexandria flowed into the Canopic arm of the Nilus Delta.

I have with me a certain Chaldaean, the Nabopolassar, who comes not from Babylon but from Chaldaea proper, where the Euphrates delta runs into the Persian Sea.

But the missing piece of the coding problem offers entree to another processlines, deltas.

Vistula delta from beardless Epp wheat to chestnut trees, willows, alders, and scrub pines.

A growling noise vibrated through the craft, signaling movement of the massive articulating flaps as they crawled out and down from the trailing edges of the delta wings.

The vegetation was dying back with the coming of autumn, but enough fleecevine and hydras bane was left to occasionally give Schultz the feeling he was back in the Mekong Delta.

BBS and the delta, slides away from it as the data slows around her, using her own separate momentum to carry her a little further into the swirling light, the bright icons of the advertisers and the punters and the users blending into a single shifting layer like the flow of a visible wind.

Agassiz represents the Fraser delta and Kamloops the southern interior district.