a) of or pertaining to porphyry
b) containing large crystals in a fine mass of material

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  • Porphyritic — Por phy*rit ic, a. [Cf. F. porphyritique.] (Min.) Relating to, or resembling, porphyry, that is, characterized by the presence of distinct crystals, as of feldspar, quartz, or augite, in a relatively fine grained base, often aphanitic or… …   The Collaborative International Dictionary of English

  • porphyritic — [pôr΄fə rit′ik] adj. [ME porphiritike < ML porphyriticus < L porphyrites < Gr porphyritēs] 1. of porphyry 2. like porphyry; having distinct crystals in a fine grained mass …   English World dictionary

  • porphyritic — adjective Etymology: Middle English porphiritike, from Medieval Latin porphyriticus, from Greek porphyritikos, from porphyritēs (lithos) porphyry Date: 15th century 1. of or relating to porphyry 2. having distinct crystals (as of feldspar) in a… …   New Collegiate Dictionary

  • porphyritic — /pawr feuh rit ik/, adj. Petrol. of, pertaining to, containing, or resembling porphyry, its texture, or its structure. [1375 1425; late ME porphiritike < ML porphyriticus < Gk porphyritikós of PORPHYRY; see IC] * * * …   Universalium

  • porphyritic — pÉ”rfɪ rɪtɪk /pɔːf adj. of alabaster, pertaining to porphyry (type of rock) …   English contemporary dictionary

  • porphyritic — [ˌpɔ:fɪ rɪtɪk] adjective Geology relating to or denoting a rock texture containing distinct crystals or crystalline particles embedded in a compact groundmass …   English new terms dictionary

  • porphyritic — por·phy·rit·ic …   English syllables

  • porphyritic — /pɔfəˈrɪtɪk/ (say pawfuh ritik) adjective 1. of, relating to, containing, or resembling porphyry. 2. denoting, relating to, or resembling the texture or structure characteristic of porphyry …   Australian English dictionary

  • porphyritic — adjective (of rocks) consisting of porphyry or containing large crystals in a fine groundmass of minerals • Pertains to noun: ↑porphyry • Derivationally related forms: ↑porphyry …   Useful english dictionary

  • Porphyritic granite — Granite Gran ite (gr[a^]n [i^]t), n. [It. granito granite, adj., grainy, p. p. of granire to make grainy, fr. L. granum grain; cf. F. granit. See {Grain}.] (Geol.) A crystalline, granular rock, consisting of quartz, feldspar, and mica, and… …   The Collaborative International Dictionary of English

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