Definify.com

Webster 1913 Edition

Trachyte

Tra′chyte

,
Noun.
[Gr. [GREEK] rough, rugged: cg. F.
trachyte
.]
(Geol.)
An igneous rock, usually light gray in color and breaking with a rough surface. It consists chiefly of orthoclase feldspar with sometimes hornblende and mica.

Webster 1828 Edition

Trachyte

TRA'CHYTE

,
Noun.
[Gr.rough.] A species of volcanic rock, composed of crystals of glassy feldspar, sometimes with crystals of hornblend, mica, iron pyrite, &c.

Similar Results