What is "shark"

Shark \Shark\, n. [Of uncertain origin; perhaps through OF. fr. carcharus a kind of dogfish, Gr. karchari`as, so called from its sharp teeth, fr. ka`rcharos having sharp or jagged teeth; or perhaps named from its rapacity (cf. Shark, v. t. & i.); cf. Corn. scarceas.]

1. (Zo["o]l.) Any one of numerous species of elasmobranch fishes of the order Plagiostomi, found in all seas.

   Note: Some sharks, as the basking shark and the whale shark, grow to an enormous size, the former becoming forty feet or more, and the latter sixty feet or more, in length. Most of them are harmless to man, but some are exceedingly voracious. The man-eating sharks mostly belong to the genera Carcharhinus, Carcharodon, and related genera. They have several rows of large sharp teeth with serrated edges, as the great white shark ( Carcharodon carcharias or Carcharodon Rondeleti) of tropical seas, and the great blue shark ( Carcharhinus glaucus) of all tropical and temperate seas. The former sometimes becomes thirty-six feet long, and is the most voracious and dangerous species known. The rare man-eating shark of the United States coast ( Charcarodon Atwoodi) is thought by some to be a variety, or the young, of C. carcharias. The dusky shark ( Carcharhinus obscurus), and the smaller blue shark ( C. caudatus), both common species on the coast of the United States, are of moderate size and not dangerous. They feed on shellfish and bottom fishes.

2. A rapacious, artful person; a sharper. [Colloq.]

3. Trickery; fraud; petty rapine; as, to live upon the shark. [Obs.]
   --South.

   Baskin shark, Liver shark, Nurse shark, Oil shark, Sand shark, Tiger shark, etc. See under Basking, Liver, etc. See also Dogfish, Houndfish, Notidanian, and Tope.

   Gray shark, the sand shark.

   Hammer-headed shark. See Hammerhead.

   Port Jackson shark. See Cestraciont.

   Shark barrow, the eggcase of a shark; a sea purse.

   Shark ray. Same as Angel fish (a), under Angel.

   Thrasher shark or Thresher shark, a large, voracious shark. See Thrasher.

   Whale shark, a huge harmless shark ( Rhinodon typicus) of the Indian Ocean. It becomes sixty feet or more in length, but has very small teeth.

Shark \Shark\, v. t. [Of uncertain origin; perhaps fr. shark, n., or perhaps related to E. shear (as hearken to hear), and originally meaning, to clip off. Cf. Shirk.] To pick or gather indiscriminately or covertly. [Obs.]
--Shak.

Shark \Shark\, v. i. [imp. & p. p. Sharked; p. pr. & vb. n. Sharking.]

1. To play the petty thief; to practice fraud or trickery; to swindle.

   Neither sharks for a cup or a reckoning.
   --Bp. Earle.

2. To live by shifts and stratagems.
   --Beau. & Fl.

c.1600, "to live by one's wits," of uncertain origin (see shark (n.)); according to OED, at least partly a variant of shirk. Meaning "obtain by sharking" is from 1610s. Related: Sharked; sharking.

1560s, of uncertain origin; apparently the word and the first specimen were brought to London by Capt. John Hawkins's second expedition (landed 1565; see Hakluyt).\nThere is no proper name for it that I knowe, but that sertayne men of Captayne Haukinses doth call it a 'sharke'

[handbill advertising an exhibition of the specimen, 1569]

\nThe meaning "dishonest person who preys on others," though attested only from 1599 (sharker "artful swindler" in this sense is from 1594), may be the original sense, later transferred to the large, voracious marine fish. If so, it is possibly from German Schorck, a variant of Schurke "scoundrel, villain," agent noun of Middle High German schürgen (German schüren) "to poke, stir."\n

\nBut on another theory, the English word is from a Mayan word, xoc, which might have meant "shark." Northern Europeans seem not to have been familiar with sharks before voyages to the tropics began. A slightly earlier name for it in English was tiburon, via Spanish (where it is attested by 1520s), from the Carib name for the fish.\n

\nThe English word was applied (or re-applied) to voracious or predatory persons, on the image of the fish, from 1707 (originally of pick-pockets); loan shark is attested from 1905. Sharkskin (1851) was used for binding books, etc. As the name of a type of fabric held to resemble it, it is recorded from 1932.\n\nThere is the ordinary Brown Shark, or sea attorney, so called by sailors; a grasping, rapacious varlet, that in spite of the hard knocks received from it, often snapped viciously at our steering oar.

[Herman Melville, "Mardi"]

Etymology 1 alt. A scaleless, predatory fish of the superorder Selachimorpha, with a cartilaginous skeleton and 5 to 7 gill slits on each side of its head. n. A scaleless, predatory fish of the superorder Selachimorpha, with a cartilaginous skeleton and 5 to 7 gill slits on each side of its head. Etymology 2

n. 1 (context informal derogatory English) A sleazy and amoral lawyer; an ambulance chaser. 2 (context informal English) A relentless and resolute person or group, especially in business. 3 (context informal English) A very good poker or pool player. 4 (context sports and games English) A person who feigns ineptitude to win money from others. vb. 1 (context obsolete English) To steal or obtain through fraud. 2 (context obsolete intransitive English) To play the petty thief; to practice fraud or trickery; to swindle. 3 (context obsolete intransitive English) To live by shifts and stratagems. Etymology 3

vb. (context obsolete English) To pick or gather indiscriminately or covertly.

1. n. any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales

2. a person who is ruthless and greedy and dishonest

3. a person who is unusually skilled in certain ways; "a card shark"

1. v. play the shark; act with trickery

2. hunt shark

In cryptography, SHARK is a block cipher identified as one of the predecessors of Rijndael (the Advanced Encryption Standard).

SHARK has a 64-bit block size and a 128-bit key size. It is a six round SP-network which alternates a key mixing stage with linear and non-linear transformation layers. The linear transformation uses an MDS matrix representing a Reed-Solomon error correcting code in order to guarantee good diffusion. The nonlinear layer is composed of eight 8×8-bit S-boxes based on the function F(x) = x over GF(2).

Five rounds of a modified version of SHARK can be broken using an interpolation attack (Jakobsen and Knudsen, 1997).

A shark is a cartilaginous, usually carnivorous fish.

Shark, Sharks or The Shark may also refer to:

The shark (Cucullia umbratica) is a moth of the family Noctuidae. It is distributed throughout much of the Palearctic ecozone ( Europe, Russia, Afghanistan, Turkestan, Mongolia), but has recently also been reported from North America, from the Magdalen Islands in Canada.

This is a fairly large species ( wingspan 52–59 mm) with long, narrow wings giving a 'streamlined' appearance. The forewings are grey with brown and black streaks. The hindwings are grey in the male, brown in the female. It flies at night in June and July and is attracted to light and a variety of flowers.

Shark is an American legal drama created by Ian Biederman that originally aired on CBS from September 21, 2006 to May 20, 2008. The series stars James Woods.

Shark (born David Shaw) is a Los Angeles-based musician, film composer, radio host, and is a founding member and guitarist for American alternative band Wild Colonials. He also records under the name Shark and Co..

Shark is a French company that produces motorcycle helmets, which was founded in 1986 in Marseille, France.

Great White (alternatively called Shark) is a 1998 horror film written and directed by Zac Reeder. The film is based on the 1916 shark attacks in New Jersey. The film's title was changed to Shark for the first United States home video release, but was kept the same internationally.

Shark (, also known as Don't Look Back: The Legend of Orpheus) is a 2013 South Korean television series, starring Kim Nam-gil and Son Ye-jin. It aired on KBS2 from May 27 to July 30, 2013 on Mondays and Tuesdays at 21:55.

The series is the third installment of the revenge trilogy by director Park Chan-hong and writer Kim Ji-woo, following Resurrection in 2005 and The Devil in 2007.

Shark is the tenth novel by Will Self, published in 2014.

Shark is a 2015 British television series created by the BBC Natural History Unit in cooperation with Discovery Channel UK.