Main Entry: di·op·side

Pronunciation: \dī-ˈäp-ˌsīd\

Function: noun

Etymology: French, from di- + Greek opsis appearance — more at optic

Date: circa 1808

: a green to white mineral that consists of pyroxene containing little or no aluminum

— di·op·sid·ic \ˌdī-ˌäp-ˈsi-dik\ adjective