Crossword clues for barium
barium
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Barium \Ba"ri*um\, n. [NL., fr. Gr. bary`s heavy.] (Chem.) One of the elements, belonging to the alkaline earth group; a metal having a silver-white color, and melting at a very high temperature. It is difficult to obtain the pure metal, from the facility with which it becomes oxidized in the air. Atomic weight, 137. Symbol, Ba. Its oxide called baryta.
Note: Some of the compounds of this element are remarkable for their high specific gravity, as the sulphate, called heavy spar, and the like. The oxide was called barote, by Guyton de Morveau, which name was changed by Lavoisier to baryta, whence the name of the metal.
Douglas Harper's Etymology Dictionary
1808, coined in Modern Latin by its discoverer, English chemist Sir Humphrey Davy (1778-1829), because it was present in the mineral barytes "heavy spar" (barium sulphate), so named by Lavoisier from Greek barys "heavy" (see grave (adj.)). The metal is actually relatively light.
Wiktionary
n. A metallic chemical element (''symbol'' Ba) with an atomic number of 56.
WordNet
n. a soft silvery metallic element of the alkali earth group; found in barite [syn: Ba, atomic number 56]
Wikipedia
Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element. The hydroxide, known in pre-modern history as baryta, does not occur as a mineral, but can be prepared by heating barium carbonate.
The most common naturally occurring minerals of barium are barite ( barium sulfate, BaSO) and witherite ( barium carbonate, BaCO), both insoluble in water. The barium name originates from the alchemical derivative "baryta", from Greek βαρύς (barys), meaning "heavy." Baric is the adjective form of barium. Barium was identified as a new element in 1774, but not reduced to a metal until 1808 with the advent of electrolysis.
Barium has only a few industrial applications. Historically, it was used as a getter for vacuum tubes. It is a component of YBCO ( high-temperature superconductors) and electroceramics, and is added to steel and cast iron to reduce the size of carbon grains within the microstructure. Barium compounds are added to fireworks to impart a green color. Barium sulfate is used as an insoluble heavy additive to oil well drilling fluid, as well as in a purer form, as X-ray radiocontrast agents for imaging the human gastrointestinal tract. The soluble barium ion and soluble compounds are poisonous, and have been used as rodenticides.
Usage examples of "barium".
The glaucous green shivered into calcimine, then livid purple, then dazzling alizarin and fuchsine and chrome orange and barium yellow.
Dark eyes in tanned, tattooed Wickan faces held cold and firm on Baria and Mesker Setral and their warriors.
Where Baria leads, Mesker follows, or will you now cross blades with your brother?
Four of them fell in the assaults at El Obeid, two at Baria, and the last two have now been killed.
The solution contains the barium as baric chloride mixed, perhaps, with salts of strontium or lime.
They bombarded uranium with slow neutrons and split it up into masurium, barium, gamma rays and more neutrons, thus establishing a cyclic process.
Pulling out his own notebook, wetting a thumb and leafing back the pages, he began to walk Angleton through his series of barium meals.
A sheet of paper coated with barium platinocyanide was fluorescing, even though it was shut off from the tube.
The salts of barium give no precipitate with sulphuretted hydrogen in either acid or alkaline solution, but with sulphuric acid they at once give a precipitate, which is insoluble in acetate of soda.
Run: part of the Gastrointestinal work-up, a series of tests, including upper GI series with small bowel follow-through, barium enema, sigmoidoscopy, liver scan, gallbladder series etc.
When cold, extract with water, and determine the sulphur volumetrically with standard barium chloride.
Dark eyes in tanned, tattooed Wickan faces held cold and firm on Baria and Mesker Setral and their warriors.
Then there's cerium one fortyfour, plutonium two thirtynine, barium oneforty.
Elements that include barium, antimony, cobalt, molybdenum and vanadium that are obtained from toxic minerals such as stibnite, barytine, patronite and mispickel.
Barium, salts of, action on Drosera, 183 Bases of salts, preponderant action of, on Drosera, 186 Basis, fibrous, of bone, its digestion by Drosera, 108 Belladonna, extract of, action on Drosera, 84 Bennett, Mr.