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Porphyry

[pawr-fuh-ree] /ˈpɔr fə ri/
noun
1.
(Malchus) a.d. c233–c304, Greek philosopher.
Related forms
Porphyrean
[pawr-feer-ee-uh n] /pɔrˈfɪər i ən/ (Show IPA),
adjective
Porphyrian, adjective, noun
Porphyrianist, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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British Dictionary definitions for malchus-porphyry

porphyry

/ˈpɔːfɪrɪ/
noun (pl) -ries
1.
any igneous rock with large crystals embedded in a finer groundmass of minerals
2.
(obsolete) a reddish-purple rock consisting of large crystals of feldspar in a finer groundmass of feldspar, hornblende, etc
Word Origin
C14 porfurie, from Late Latin porphyrītēs, from Greek porphuritēs (lithos) purple (stone), from porphuros purple

Porphyry

/ˈpɔːfɪrɪ/
noun
1.
original name Malchus. 232–305 ad, Greek Neo-Platonist philosopher, born in Syria; disciple and biographer of Plotinus
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
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Word Origin and History for malchus-porphyry

porphyry

n.

type of ornamental stone, late 14c., porfurie, from Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites, a purple semi-precious stone quarried near the Red Sea in Egypt, from Greek porphyrites (lithos) "the purple (stone)," from porphyra (n.) "purple, purple dye" (see purple). Spelling Latinized mid-15c. Now used generally for a type of igneous rock without regard to color. Porphyrios was an ancient proper name.

Online Etymology Dictionary, © 2010 Douglas Harper
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malchus-porphyry in Science
porphyry
  (pôr'fə-rē)   
An igneous rock containing the large crystals known as phenocrysts embedded in a fine-grained matrix.

porphyritic adjective (pôr'fə-rĭt'ĭk)
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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