actinolite actinolite /ˈækˈtɪnəˌlaɪt/

noun

1. A green mineral of the amphibole group; calcium magnesium iron silicate  ( actinolite )
   a green mineral of the amphibole group; calcium magnesium iron silicate
    We identified the green mineral in the sample as actinolite.
   We identified the green mineral in the sample as actinolite.