magnesite

[ mag-nuh-sahyt ]
/ ˈmæg nəˌsaɪt /

noun

a mineral, magnesium carbonate, MgCO3, having a characteristic conchoidal fracture and usually occurring in white masses.

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Origin of magnesite

1805–15; magnes(ia) + -ite1; compare French magnésite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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British Dictionary definitions for magnesite

magnesite
/ (ˈmæɡnɪˌsaɪt) /

noun

a white, colourless, or lightly tinted mineral consisting of naturally occurring magnesium carbonate in hexagonal crystalline form: a source of magnesium and also used in the manufacture of refractory bricks. Formula: MgCO 3

Word Origin for magnesite

C19: from magnesium + -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