lamprophyre

[ lam-pruh-fahyuhr ]
/ ˈlæm prəˌfaɪər /

noun Petrology.

any dark intrusive rock in which dark minerals occur both as phenocrysts and as groundmass.

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Origin of lamprophyre

1885–90; lampro- (<Greek lamprós clear) + -phyre

OTHER WORDS FROM lamprophyre

lam·pro·phyr·ic [lam-pruh-fir-ik], /ˌlæm prəˈfɪr ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for lamprophyre

British Dictionary definitions for lamprophyre

lamprophyre
/ (ˈlæmprəˌfaɪə) /

noun

any of a group of basic igneous rocks consisting of feldspathoids and ferromagnesian minerals, esp biotite: occurring as dykes and minor intrusions

Word Origin for lamprophyre

C19: from Greek lampros bright + -phyre, from porphyry
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

Scientific definitions for lamprophyre

lamprophyre
[ lămprə-fīr′ ]

A dark igneous rock, having a porphyritic texture in which both the phenocrysts (larger crystals) and the matrix consist primarily of pyroxene, hornblende, and biotite.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.