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A greenish mineral of the mica group, a hydrous silicate of potassium, iron, aluminum, or magnesium, (K,Na)(Al,Fe,Mg)2(Al,Si)4O10(OH)2, found in greensand and used as a fertilizer and water softener.
[German Glaukonit : Greek glaukon, neuter of glaukos, gray + -ite.]
glau′co·nit′ic (-nĭt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Minerals) 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
[C19: from Greek glaukon, neuter of glaukos bluish-green + -ite1; see glaucous]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a greenish micaceous mineral, mainly a hydrous silicate of potassium, aluminum, and iron, occurring in greensand and clays.
glau`co•nit′ic (-kəˈnɪt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||glauconite - a green mineral consisting of hydrated silicate of potassium or iron or magnesium or aluminum; found in greensand|
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
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