greenschist

[ green-shist ]
/ ˈgrinˌʃɪst /

noun Petrology.

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

Origin of greenschist

Scientific definitions for greenschist

greenschist
[ grēnshĭst′ ]

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.