[ dahy-op-sahyd, -sid ]
/ daɪˈɒp saɪd, -sɪd /

noun Mineralogy.

a monoclinic pyroxene mineral, calcium magnesium silicate, CaMg(SiO3)2, occurring in various colors, usually in crystals.


Discover The Influence Of Portuguese On English Via This Quiz!
We’ve gathered some interesting words donated to English from Portuguese … as well as some that just don’t translate at all. Do you know what they mean?
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Which of the following animal names traces its immediate origin to Portuguese?

Origin of diopside

1800–10; di-3 + Greek óps(is) appearance + -ide
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for diopside

British Dictionary definitions for diopside

/ (daɪˈɒpsaɪd, -sɪd) /


a colourless or pale-green pyroxene mineral consisting of calcium magnesium silicate in monoclinic crystalline form: used as a gemstone. Formula: CaMgSi 2 O 6

Word Origin for diopside

C19: from di- ² + Greek opsis sight, appearance + -ide
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 diopside

[ dī-ŏpsīd′ ]

A light green, monoclinic variety of pyroxene, used as a gemstone and as a refractory material. Chemical formula: CaMgSi2O6.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.