[ trey-kahyt, trak-ahyt ]
/ ˈtreɪ kaɪt, ˈtræk aɪt /


a fine-grained volcanic rock consisting essentially of alkali feldspar and one or more subordinate minerals, as hornblende or mica: the extrusive equivalent of syenite.

Origin of trachyte

1815–25; < French < Greek trāchýtēs roughness, equivalent to trāchý(s) rough + -tēs noun suffix

Related forms

tra·chyt·ic [truh-kit-ik] /trəˈkɪt ɪk/, trach·y·toid [trak-i-toid, trey-ki-] /ˈtræk ɪˌtɔɪd, ˈtreɪ kɪ-/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for trachytic

British Dictionary definitions for trachytic (1 of 2)


/ (trəˈkɪtɪk) /


(of the texture of certain igneous rocks) characterized by a parallel arrangement of crystals, which mark the flow of the lava when still molten

British Dictionary definitions for trachytic (2 of 2)


/ (ˈtreɪkaɪt, ˈtræ-) /


a light-coloured fine-grained volcanic rock of rough texture consisting of feldspars with small amounts of pyroxene or amphibole

Derived Forms

trachytoid (ˈtrækɪˌtɔɪd, ˈtreɪ-), adjective

Word Origin for trachyte

C19: from French, from Greek trakhutēs, from trakhus rough
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for trachytic


[ trākīt′, trăkīt′ ]

A light-colored, fine-grained igneous rock consisting primarily of alkali feldspar together with some mafic minerals, especially hornblende. Unlike most igneous rocks, trachyte has little or no quartz. Trachyte is the fine-grained equivalent of syenite.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.