monazite

[ mon-uh-zahyt ]
/ ˈmɒn əˌzaɪt /

noun

a reddish- or yellowish-brown mineral, a phosphate of cerium and lanthanum, (Ce,La)PO4: the principal ore of thorium.

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Origin of monazite

First recorded in 1830–40; from German Monazit, equivalent to monaz- (from Greek monázein “to be alone, live alone”) + -it noun suffix; see mon-,-ite1 (so called from its rarity)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for monazite

monazite
/ (ˈmɒnəˌzaɪt) /

noun

a yellow to reddish-brown mineral consisting of a phosphate of thorium, cerium, and lanthanum in monoclinic crystalline form

Word Origin for monazite

C19: from German, from Greek monazein to live alone, so called because of its rarity
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

Scientific definitions for monazite

monazite
[ mŏnə-zīt′ ]

A yellow or reddish-brown monoclinic mineral that is a principal ore of several lanthanide (rare-earth) elements. It occurs as tabular crystals in pegmatites, granites, and metamorphic rocks, as well as in sand. Chemical formula: (Ce, La, Nd, Th)PO4.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.