porphyry
1 Americannoun
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a very hard rock, anciently quarried in Egypt, having a dark, purplish-red groundmass containing small crystals of feldspar.
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Petrology. any igneous rock containing coarse crystals, as phenocrysts, in a finer-grained groundmass.
noun
noun
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any igneous rock with large crystals embedded in a finer groundmass of minerals
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obsolete a reddish-purple rock consisting of large crystals of feldspar in a finer groundmass of feldspar, hornblende, etc
noun
Other Word Forms
Derived Forms
Etymology
Origin of porphyry
1350–1400; Middle English porfurie, porfirie < Medieval Latin porphyreum, alteration of Latin porphyrītēs < Greek porphyrī́tēs porphyry, short for porphyrī́tēs líthos porphyritic (i.e., purplish) stone, equivalent to pórphyr ( os ) purple + -ītēs; see -ite 1
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The team's ongoing research shows similar results for identifying porphyry copper deposits.
From Science Daily • Oct. 24, 2023
It's a square of about 7.5 metres, with a design of interlocking patterns, using inlaid stones, such as purple-coloured porphyry and yellow limestone.
From BBC • Mar. 23, 2023
Trompe l’oeil artists were also highly in demand in the decorative arts, and wealthy patrons would hire peintres-décorateurs to shellac their drawing rooms with imitation marble and porphyry.
From New York Times • Nov. 11, 2022
Sediment-hosted copper deposits occurring in sandstones, shales, and marls are enormous in size and their contained resources are comparable to porphyry copper deposits.
From Textbooks • Jan. 1, 2017
Like the stadium, most were being clad with natural stone, all of it German—more limestone from Franconia, basalt from the Eifel hills, granite and marble from Silesia, travertine from Thuringia, porphyry from Saxony.
From "The Boys in the Boat: Nine Americans and Their Epic Quest for Gold at the 1936 Berlin Olympics" by Daniel James Brown
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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.