7 results for: Hematite

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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

he·ma·tite

Audio Help [hee-muh-tahyt, hem-uh-] Pronunciation Key

–noun

a very common mineral, iron oxide, Fe₂O₃, occurring in steel-gray to black crystals and in red earthy masses: the principal ore of iron.

[Origin: 1535–45; < L haematītes bloodstone < Gk haimattés (lithós) bloodlike (stone). See hemat-, -ite¹

]

—Related forms

he·ma·tit·ic

Audio Help [hee-muh-tit-ik, hem-uh-] Pronunciation Key, adjective

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

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Hematite

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American Heritage Dictionary - Cite This Source - Share This

he·ma·tite Audio Help (hē'mə-tīt') Pronunciation Key
n. A black or blackish-red to brick-red mineral, essentially Fe₂O₃, the chief ore of iron.

[Middle English emathite, ematites, from Latin haematītēs, from Greek (lithos) haimatītēs, bloodlike (stone), from haima, haimat-, blood.]

he'ma·tit'ic (-tĭt'ĭk) adj.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

Online Etymology Dictionary - Cite This Source - Share This
hematite

1543, from M.Fr. hematite, from L. hæmatites, from Gk. haimatites lithos "bloodlike stone," from haima (gen. haimatos) "blood" (see -emia).

WordNet - Cite This Source - Share This

hematite
noun
the principal form of iron ore; consists of ferric oxide in crystalline form; occurs in a red earthy form

The American Heritage Science Dictionary - Cite This Source - Share This

hematite Audio Help (hē'mə-tīt') Pronunciation Key
A reddish-brown to silver-gray metallic mineral. Hematite occurs as rhombohedral crystals, as reniform (kidney-shaped) crystals, or as fibrous aggregates in igneous, metamorphic, and sedimentary rocks. It is the most abundant ore of iron, and it is usually slightly magnetic. Chemical formula: Fe₂O₃.

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Hematite

Fer"ric\, a. [L. ferrum iron: cf. F. ferrique. See Ferrous.] Pertaining to, derived from, or containing iron. Specifically (Chem.), denoting those compounds in which iron has a higher valence than in the ferrous compounds; as, ferric oxide; ferric acid.

Ferric acid (Chem.), an acid, H2FeO4, which is not known in the free state, but forms definite salts, analogous to the chromates and sulphates.

Ferric oxide (Chem.), sesquioxide of iron, Fe2O3; hematite. See Hematite.

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