hematite, haematite
(noun) the principal form of iron ore; consists of ferric oxide in crystalline form; occurs in a red earthy form
Source: WordNet® 3.1
hematite (usually uncountable, plural hematites)
(mineral) An iron ore, mainly peroxide of iron, Fe2O3.
• kidney ore
• martite
Source: Wiktionary
Hem"a*tite, n. Etym: [L. haematites, Gr. a"i^ma, a"i`matos, blood.] (Min.)
Definition: An important ore of iron, the sesquioxide, so called because of the red color of the powder. It occurs in splendent rhombohedral crystals, and in massive and earthy forms; -- the last called red ocher. Called also specular iron, oligist iron, rhombohedral iron ore, and bloodstone. See Brown hematite, under Brown.
Source: Webster’s Unabridged Dictionary 1913 Edition
27 December 2024
(adjective) restricted to a particular condition of life; “an obligate anaerobe can survive only in the absence of oxygen”
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