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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Hematite \Hem"a*tite\, noun [L. haematites, Gr. ? bloodlike, fr. a"i^ma, a"i'matos, blood.] (Min.) 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}.
From WordNet (r) 2.0 [wn]:
hematite
noun: the principal form of iron ore; consists of ferric oxide in crystalline form; occurs in a red earthy form [syn: {haematite}]
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