Glaucomatous cup



glaucomatous cup n.
A deep depression of the optic disk caused by glaucoma. Also called glaucomatous excavation.

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    glaucomatous halo n.

  • Glauconite

    [glaw-kuh-nahyt] /ˈglɔ kəˌnaɪt/ noun 1. a greenish micaceous mineral consisting essentially of a hydrous silicate of potassium, aluminum, and iron and occurring in greensand, clays, etc. /ˈɡlɔːkəˌnaɪt/ noun 1. a green mineral consisting of the hydrated silicate of iron, potassium, aluminium, and magnesium: found in greensand and other similar rocks. Formula: (K,Na,Ca)0.5-1(Fe,Al,Mg)2(Si,Al)4O10(OH)2.nH2O



  • Glauconitic

    [glaw-kuh-nahyt] /ˈglɔ kəˌnaɪt/ noun 1. a greenish micaceous mineral consisting essentially of a hydrous silicate of potassium, aluminum, and iron and occurring in greensand, clays, etc. /ˈɡlɔːkəˌnaɪt/ noun 1. a green mineral consisting of the hydrated silicate of iron, potassium, aluminium, and magnesium: found in greensand and other similar rocks. Formula: (K,Na,Ca)0.5-1(Fe,Al,Mg)2(Si,Al)4O10(OH)2.nH2O

  • Glaucophane

    [glaw-kuh-feyn] /ˈglɔ kəˌfeɪn/ noun 1. a sodium-rich monoclinic mineral of the amphibole family, usually metamorphic. glaucophane (glou’kə-fān’) A blue to grayish-blue or bluish-black monoclinic mineral of the amphibole group. Glaucophane occurs as fibrous prisms in schists (especially blueschists) formed by the regional metamorphism of sodium-rich rocks. Chemical formula: Na2(Mg,Fe)3Al2Si8O22(OH)2.



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