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Table of Contents -- porphyry
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HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
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porphyry

 : 
Noun
 : 
por=phy=ry

WORDNET DICTIONARY

Noun porphyry has 1 sense

CIDE DICTIONARY

porphyryn. [F. porphyre, L. porphyrites, fr. Gr. like purple, fr. purple. See Purple.].
     A term used somewhat loosely to designate a rock consisting of a fine-grained base (usually feldspathic) through which crystals, as of feldspar or quartz, are disseminated. There are red, purple, and green varieties, which are highly esteemed as marbles.  [1913 Webster]
Porphyry shell (Zoöl.), a handsome marine gastropod shell (Oliva porphyria), having a dark red or brown polished surface, marked with light spots, like porphyry.

OXFORD DICTIONARY

porphyry, n. (pl. -ies)
1 a hard rock quarried in ancient Egypt, composed of crystals of white or red feldspar in a red matrix.
2 Geol. an igneous rock with large crystals scattered in a matrix of much smaller crystals.

Derivative
porphyritic adj.
Etymology
ME ult. f. med.L porphyreum f. Gk porphurites f. porphura purple
See related words and definitions of word "porphyry" in Indonesian
Also see definition of "porphyry" in Bible Study Dictionaries
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