a greenish micaceous mineral consisting essentially of a hydrous silicate of potassium, aluminum, and iron and occurring in greensand, clays, etc.

Origin of glauconite

1830–40; < Greek glaukón, neuter of glaukós (see glauco-) + -ite1
Related formsglau·co·nit·ic [glaw-kuh-nit-ik] /ˌglɔ kəˈnɪt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for glauconitic



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) 4 O 10 (OH) 2 .nH 2 O
Derived Formsglauconitic (ˌɡlɔːkəˈnɪtɪk), adjective

Word Origin for glauconite

C19: from Greek glaukon, neuter of glaukos bluish-green + -ite 1; see glaucous
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012