porphyry(redirected from Porphyrius)
Also found in: Thesaurus, Encyclopedia.
n. pl. por·phy·ries
1. Any of various varieties of reddish-purple rock, often containing light-colored crystals, used as a decorative stone.
2. Geology Rock containing relatively large conspicuous crystals, especially of feldspar, in a fine-grained igneous matrix.
[Middle English porphiri, porfurie, purplish-red porphyry, from Old French porfire, from Italian porfiro, from Medieval Latin porphyrium, from Latin porphyrītēs, from Greek porphurītēs, from porphurā, mollusk yielding Tyrian purple, Tyrian purple garment; see purple.]
n, pl -ries
1. (Geological Science) any igneous rock with large crystals embedded in a finer groundmass of minerals
2. (Geological Science) obsolete a reddish-purple rock consisting of large crystals of feldspar in a finer groundmass of feldspar, hornblende, etc
[C14 porfurie, from Late Latin porphyrītēs, from Greek porphuritēs (lithos) purple (stone), from porphuros purple]
(Biography) original name Malchus. 232–305 ad, Greek Neo-Platonist philosopher, born in Syria; disciple and biographer of Plotinus
por•phy•ry(ˈpɔr fə ri)
n., pl. -ries.
1. a very hard rock, anciently quarried in Egypt, having a dark, purplish red groundmass containing small crystals of feldspar.
2. any igneous rock containing coarse crystals, as phenocrysts, in a finer-grained groundmass.
[1350–1400; Middle English porfurie, porfirie < Medieval Latin porphyreum, alter. of Latin porphyrītēs < Greek porphyritēs (líthos) porphyritic (i.e., purplish) stone =pórphyr(os) purple + -ītēs; see -ite1]
por`phy•rit′ic (-ˈrɪt ɪk) adj.
A fine-grained igneous rock containing some relatively large crystals, especially of feldspar.
Switch to new thesaurus
|Noun||1.||porphyry - any igneous rock with crystals embedded in a finer groundmass of minerals|
groundmass - (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded
igneous rock - rock formed by the solidification of molten magma