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amblygonite

[am-blig-uh-nahyt]
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noun
  1. a mineral, a lithium aluminum fluorophosphate, Li(AlF)PO4: an ore of lithium.
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Origin of amblygonite

1840–50; < Greek amblygṓn(ios) (amblý(s) blunt, obtuse + gōní(a) angle + -os adj. suffix) + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for amblygonite

amblygonite

noun
  1. a white or greyish mineral consisting of lithium aluminium fluorophosphate in triclinic crystalline form. It is a source of lithium. Formula: (Li,Na)Al(PO 4)(F,OH)
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Word Origin

C16: from Greek amblugōnios, from amblus blunt + gōnia angle; referring to the obtuse angles in its crystals
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