from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A greenish form of mica found in greensand
from the GNU version of the Collaborative International Dictionary of English
- n. The green mineral characteristic of the greensand of the chalk and other formations. It is a hydrous silicate of iron and potash. See greensand.
from The Century Dictionary and Cyclopedia
- n. A mineral which is essentially a hydrous silicate of iron and potassium. It is the “green earth” of the cavities of eruptive rocks, or the substance which gives the color to the grains of greensand and chalk.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a green mineral consisting of hydrated silicate of potassium or iron or magnesium or aluminum; found in greensand
German Glaukonit : Greek glaukon, neuter of glaukos, gray + -ite1.(American Heritage® Dictionary of the English Language, Fourth Edition)