barium
A metallic, alkaline, divalent earth element; atomic no. 56, atomic wt. 137.327. Insoluble salts are often used in radiology as contrast media. [G. barys, heavy]
- b. chloride formerly used as a heart tonic and for varicose veins; extremely toxic.
- b. hydroxide a caustic compound combined with calcium hydroxide in a carbon dioxide absorbent; used in anesthetic circuits. SEE ALSO: absorbent (3).
- b. meal oral administration of b. sulfate suspension for radiographic study of the upper gastrointestinal tract (British usage).
- b. oxide, b. monoxide it is caustic, forming the strong base, Ba(OH)2, in water; used as a dehydrating agent. SYN: baryta.
- b. sulfate given as a suspension orally, rectally, or through a tube, for radiographic demonstration of a part of the gastrointestinal tract. See enteroclysis, b. enema.
- b. sulfide a poisonous grayish yellow powder, used as a depilatory.
- b. swallow oral administration of b. sulfate suspension for radiographic investigation of the hypopharynx and esophagus.

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bar·i·um 'bar-ē-əm, 'ber- n
1) a silver-white malleable toxic bivalent metallic element of the alkaline-earth group that occurs only in combination symbol Ba see ELEMENT (table)
2) barium sulfate

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bar·ium (Ba) (barґe-əm) [L., from Gr. baros weight] a pale, yellowish, metallic element belonging to the alkaline earths; atomic number 56, atomic weight 137.34. Its acid-soluble salts are poisonous; see barium poisoning, under poisoning.

Medical dictionary. 2011.

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  • Barium — (pronEng|ˈbɛəriəm) is a chemical element. It has the symbol Ba, and atomic number 56. Barium is a soft silvery metallic alkaline earth metal. It is never found in nature in its pure form due to its reactivity with air. Its oxide is historically… …   Wikipedia

  • Barium — Sn (ein Erdalkali Metall) per. Wortschatz fach. (19. Jh.) Neoklassische Bildung. Die deutschen Bergleute gaben einem schweren, neben Erzen gefundenen Mineral den Namen Schwerspat (Spat1). Die Schweden Scheele und Gahn isolierten daraus um 1774… …   Etymologisches Wörterbuch der deutschen sprache

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  • barium — Symbol: Ba Atomic number: 56 Atomic weight: 137.34 Silvery white reactive element, belonging to group 2 of the periodic table. Soluble barium compounds are extremely poisonous. Identified in 1774 by Karl Scheele and extracted in 1808 by Humphry… …   Elements of periodic system

  • barium — 1808, coined in Modern Latin from Gk. barys heavy; so called 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 Gk. barys heavy… …   Etymology 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 …   The Collaborative International Dictionary of English

  • Barĭum [1] — Barĭum (a. Geogr.), s. Bari 3) …   Pierer's Universal-Lexikon

  • Barĭum [2] — Barĭum (Chem.), s. Baryum …   Pierer's Universal-Lexikon

  • Barĭum — Barĭum, s. Baryum …   Meyers Großes Konversations-Lexikon

  • Barium — Barium, s. Baryum …   Lexikon der gesamten Technik

  • BARIUM — Apuliae oppid. vulgo BARRI. Barensis agri caput, probe munitum, in ora sinus Veneti. 8. milliar. a Bitonto. Festus sic dictum scribit a conditoribus, qui expulsi ex insul. Bara urbem hanc condiderunt. Hîc Reges Neapolitani coronari solebant.… …   Hofmann J. Lexicon universale

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