EXAMPLES | WORD ORIGIN noun 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 , [tr uh- kit-ik] /trəˈkɪt ɪk/ trach·y·toid , [ trak-i-toid, trey-ki-] /ˈtræk ɪˌtɔɪd, ˈtreɪ kɪ-/ adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for trachyte Historical Examples of trachyte British Dictionary definitions for trachyte noun 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
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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.
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