alunite

[al-yuh-nahyt]

Origin of alunite

1865–70; < French alun (< Latin alūmen alum1) + -ite1
Also called al·um·stone [al-uh m-stohn] /ˈæl əmˌstoʊn/.
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Historical Examples of alunite


British Dictionary definitions for alunite

alunite

noun
  1. a white, grey, or reddish mineral consisting of hydrated aluminium sulphate. It occurs in volcanic igneous rocks and is a source of potassium and aluminium compounds. Formula: KAl 3 (SO 4) 2 (OH) 6

Word Origin for alunite

C19: from French alun alum (from Latin alūmen) + -ite 1
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