Actinolite

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A mineral with monoclinic crystals of the chemical formula Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂, belonging to the amphibole group. countable, uncountable
  2. 2
    a green mineral of the amphibole group; calcium magnesium iron silicate wordnet

Etymology

From actino- + -lite.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.