Hornblende \Horn"blende`\, n. [G., fr. horn horn + blende
blende.] (Min.)
The common black, or dark green or brown, variety of
amphibole. (See {Amphibole}.) It belongs to the aluminous
division of the species, and is also characterized by its
containing considerable iron. Also used as a general term to
include the whole species.
[1913 Webster]
{Hornblende schist} (Geol.), a hornblende rock of schistose
structure.
[1913 Webster]