hornblende


horn·blende

noun \-ˌblend\

Definition of HORNBLENDE

:  a mineral that is the common dark green to black variety of aluminous amphibole; broadly :  amphibole 2
horn·blend·ic \hrn-ˈblen-dik\ adjective

Origin of HORNBLENDE

German
First Known Use: 1770

hornblende

noun    (Concise Encyclopedia)

Any of a subgroup of amphibole minerals that are calcium-iron-magnesium-rich and monoclinic in crystal structure. Hornblende, whose generalized chemical formula is (Ca,Na)(Mg,Fe,Al)(Al,Si)O(OH), occurs widely in metamorphic and igneous rocks. Common hornblende is dark green to black in colour and usually found in middle-grade metamorphic rocks (formed under medium conditions of temperature and pressure). Such metamorphic rocks with abundant hornblende are called amphibolites.

Browse

Next Word in the Dictionary: hornblendite
Previous Word in the Dictionary: hornbill
All Words Near: hornblende

Seen & Heard

What made you want to look up hornblende? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More