- A metallic element, atomic no. 24, atomic wt. 51.9961. A dietary essential bioelement. 51Cr (half-life of 27.70 days) is used as a diagnostic aid in many disorders ( e.g., gastrointestinal protein loss). [G. chroma, color]- c. trioxide CrO3; chromic acid, a strong oxidizing agent used as a caustic in the removal of warts and other small growths from the skin and genitals; the hydrated acid, H2CrO4, forms variously colored salts with potassium, lead, and other bases.
* * *chro·mi·um 'krō-mē-əm n a blue-white metallic element found naturally only in combination and used esp. in alloys and in electroplating symbol Cr see ELEMENT (table)
* * *chro·mi·um (Cr) (kroґme-əm) [L., from Gr. chrōma color] a blue-white, brittle metal, atomic number 24, atomic weight 51.996, specific gravity 7.1; several of its compounds are pigments, and the metal itself is used for weather-resistant plating; it is also an important component of most base metal alloys used in dentistry. Chromium plays a role in glucose metabolism and is considered essential in trace amounts in nutrition. Hexavalent chromium is carcinogenic.
Medical dictionary. 2011.
Look at other dictionaries:
Chromium OS — Une capture d écran de ChromiumOS Flow le 7 mars 2010 … Wikipédia en Français
Chromium OS — Screenshot of Chromium OS Vanilla v0.13 running in a Virtual Machine … Wikipedia
Chromium OS — Parte de la familia Unix like (Linux) Chromium OS en web corriendo en VMware … Wikipedia Español
Chromium B.S.U. — Chromium B.S.U. Version 0.9.14.1 Platform(s) … Wikipedia
chromium — [krō′mē əm] n. [ModL < Fr chrome < Gr chrōma (see CHROMA) + IUM; so named (1797) by N. L. Vauquelin, Fr chemist, its discoverer, because of its bright colored compounds] a grayish white, crystalline, very hard, metallic chemical element… … English World dictionary
Chromium — Chro mi*um, n. [NL., fr. Gr. ? color.] (Chem.) A comparatively rare element occurring most abundantly in the mineral chromite. Atomic weight 52.5. Symbol Cr. When isolated it is a hard, brittle, grayish white metal, fusible with difficulty. Its… … The Collaborative International Dictionary of English
Chromium — (Chrommetall), so v. w. Chrom … Pierer's Universal-Lexikon
chromium — Symbol: Cr Atomic number: 24 Atomic weight: 51.996 Hard silvery transition element. Used in decorative electroplating. Discovered in 1797 by Vauquelin … Elements of periodic system
chromium — metallic element, 1807, with metallic elemental suffix ium + Fr. chrome, the name proposed for the new element by Fourcroy and Haüy, from Gk. chroma color (see CHROME (Cf. chrome)). So called for its colorful compounds. Related: Chromite … Etymology dictionary
chromium — ► NOUN ▪ a hard white metallic chemical element used in stainless steel and other alloys … English terms dictionary
Chromium — This article is about the chemical element. For other uses, see Chromium (disambiguation). vanadium ← chromium → manganese ↑ Cr ↓ Mo … Wikipedia