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[hee-muh-tahyt, hem-uh-] /ˈhi məˌtaɪt, ˈhɛm ə-/

a very common mineral, iron oxide, Fe 2 O 3 , occurring in steel-gray to black crystals and in red earthy masses: the principal ore of iron.
a red, grey, or black mineral, found as massive beds and in veins and igneous rocks. It is the chief source of iron. Composition: iron (ferric) oxide. Formula: Fe2O3. Crystal structure: hexagonal (rhombohedral) Also called iron glance

1540s, haematites, from Middle French hematite (16c.), from Latin haematites, from Greek haimatites lithos “bloodlike stone,” from haima (genitive haimatos) “blood” (see -emia). Earlier as emachite (late 14c.).
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.


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    1. a variant of : hematogenesis. combining form 1. US variants of haemato- also haemato-, word-forming element meaning “blood,” from Greek haimato-, comb. form of haima (genitive haimatos) “blood” (see -emia). hemato- or hemat- or haemat- or haemato- pref. Blood: hematology. hemato- Variant of hemo-. hemo- or hemato- A prefix meaning “blood,” as in hemophilia, […]

  • Hematoblast

    [hi-mat-uh-blast, hee-muh-tuh-, hem-uh-] /hɪˈmæt əˌblæst, ˈhi mə tə-, ˈhɛm ə-/ noun 1. an immature blood cell, especially a red blood cell. hematoblast he·ma·to·blast (hē’mə-tə-blāst’, hĭ-māt’ə-) n. An immature undifferentiated blood cell. he’ma·to·blas’tic adj.

  • Hematocele

    [hi-mat-uh-seel, hee-muh-tuh-, hem-uh-] /hɪˈmæt əˌsil, ˈhi mə tə-, ˈhɛm ə-/ noun, Pathology. 1. hemorrhage into a cavity, as the cavity surrounding the testis. 2. such a cavity. hematocele he·ma·to·cele (hē’mə-tə-sēl’, hĭ-māt’ə-) n.

  • Hematocephaly

    hematocephaly he·ma·to·ceph·a·ly (hē’mə-tō-sěf’ə-lē, hĭ-māt’ə-) n. An effusion of blood within the brain.

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