greenschist

[ green-shist ]

noun

, Petrology.

1. schist colored green by an abundance of chlorite, epidote, or actinolite.

greenschist

/ grēn′shĭst′ /

1. A green, schistose metamorphic rock that gets its color from the presence of chlorite, epidote, or actinolite. Greenschist forms under conditions of low temperature and low pressure.

Word History and Origins

Origin of greenschist¹

green + schist