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trondhjemite

American  
[tron-ye-mahyt] / ˈtrɒn yɛˌmaɪt /

noun

Petrology.

  1. a coarse-grained igneous rock composed of quartz, plagioclase feldspar, and a small amount of biotite.

Etymology

Origin of trondhjemite

Trondhjem (now Trondheim ) + -ite 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.