Olivine

//ˈɑl.əˌvin// noun

Definitions

Noun
  1. 1
    Any of a group of olive green magnesium-iron silicate minerals that crystallize in the orthorhombic system. countable, uncountable

    "The olivine crystals in most basalts are imperfect, lacking clear crystal faces."

  2. 2
    a mineral consisting of magnesium iron silicate; a source of magnesium wordnet

Etymology

From olive + -in, later remodelled after -ine.

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