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diopside

(dī äp′sīd′, -sid)

noun

a light-colored, hard, crystalline pyroxene, CaMg(SiO), calcium magnesium silicate, found in some limestones and metamorphic rocks and sometimes used as a gem

Origin: Fr < di- (see di-) + Gr opsis, appearance, sight (< ōps, eye); assoc. in meaning with Gr diopsis, transparency < dia-, through + opsis, sight

See diopside in American Heritage Dictionary 4

noun

A light green, monoclinic pyroxene mineral, CaMgSi₂O₆, used as a gemstone and refractory.

Origin:

Origin: French

Origin: : di-, two (from Greek; see di-¹)

Origin: + Greek -opsis, -opsis

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