porphyriticadj.

Brit.

/ˌpɔːfᵻˈrɪtɪk/, U.S.

/ˌpɔrfəˈrɪdɪk/

Forms:

α. late Middle English prophiritike (transmission error), 1700s– porphyritic.

β. 1600s–1700s porphyretick, 1700s porphyretic.

Origin: A borrowing from Latin. Etymons: Latin porphyriticus; Latin porphyrēticus.

Etymology: Originally partly (in α. forms) < post-classical Latin porphyriticus (from 12th cent. in British sources; see also quot. ?a1475 at sense 1) < classical Latin porphyrītēs porphyrite n.¹ + -icus -ic suffix; and partly (in β. forms) < classical Latin porphyrēticus (Suetonius: see quot. 1796 at sense 1) < Hellenistic Greek πορϕυριτικός < πορϕυρίτης (see porphyrite n.¹) + -ικός -ic suffix. In sense 2 apparently directly < porphyrite n.¹ + -ic suffix; compare -itic suffix.

†1. Of, relating to, or of the nature of porphyry. Obsolete.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > ancient porphyry

porphyritic?a1475

porphyrate1612

porphyrian1638

society > occupation and work > materials > raw material > gem or precious stone > rock crystal > [adjective] > porphyry

porphyritic?a1475

porphyrate1612

porphyrian1638

?a1475 (?a1425) tr. R. Higden Polychron. (Harl. 2261) (1874) V. 131 (MED) Themperour..made a fonte or baptistery of a ston prophiritike [read porphiritike; a1387 J. Trevisatr. a maner stoon þat hatte porphiriticus; L. lapide porphyritico].

1656 T. Blount Glossographia Porphyretick, belonging to red Marble, or purple.

1677 E. Coles Eng. Dict. (new ed.) Porphyretick, belonging to purple, or to Porphyry.

1711 J. Bingham Origines Ecclesiasticae III. i. 218 Durantus indeed has a very formal Story..how Constantine gave a rich Font to the Church, wherein he himself was baptized; it was made, the Author says, of Porphyretick Marble, overlaid with Silver.

1796 A. Thomson tr. Suetonius Lives First Twelve Cæsars 470 A coffin, with an altar of porphyretic marble of Luna over it.

2. Geology. Of a rock or its texture: containing distinct crystals or crystalline particles embedded in a compact groundmass.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > porphyry

porphyritic1791

porphyroid1798

porphyraceous1799

porphyric1824

phyric1958

1791 Philos. Trans. (Royal Soc.) 81 50 Lilleshall Hill near Shifnal, in Shropshire,..affords such siliceous, besides semi-granitic, porphyritic, and common whinstone, containing agate.

1799 R. Kirwan Geol. Ess. 303 It reposes on indurated clay, as this does on a porphyritic rock.

1858 H. D. Rogers Geol. Pennsylvania I. i. 69 This variety may be designated a porphyritic gneiss, having that feature of an excess of crystalline felspar which is accepted by geologists as a distinctive character of the porphyritic rocks.

1884 Leisure Hour June 356/2 Two sphinxes in the porphyritic diorite of Assouan.

1954 C. E. Tilley et al. Harker's Petrol. (ed. 8) i. 24 In some of the plutonic rocks, however, and especially among the granites, occur relatively large crystals of felspar, which give a porphyritic character to the rock of which they form part.

1970 Nature 25 July 365/2 The upper contact is gradational into porphyritic pyroxenite.

1990 C. Pellant Rocks, Minerals & Fossils 19/2 The texture is fine-grained but phenocrysts of plagioclase, often sanidine, commonly occur to give a porphyritic texture.

Derivatives

porphyˈritically adv. Geology (now rare) so as to form a porphyritic rock; as crystals in a porphyritic rock.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adverb] > porphyry

porphyritically1851

1851 S. F. Baird tr. J. G. Heck Iconogr. Encycl. I. Geogn. 212 The glassy [trachytic lava] is formed by pumices and obsidian; it is either pure, or contains porphyritically separated particles of feldspar.

1886 Bull. U.S. Geol. Surv. No. 28. 53 Small rounded grains..in which crystals of the other minerals are porphyritically imbedded.

1909 Geogr. Jrnl. 34 520 The formations are surprisingly constant, the prevailing one being of metamorphic granite rock, traversed by quartz reefs. In some of these felspars occur porphyritically.

This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022).

单词	porphyritic
释义	porphyriticadj. Brit. /ˌpɔːfᵻˈrɪtɪk/, U.S. /ˌpɔrfəˈrɪdɪk/ Forms: α. late Middle English prophiritike (transmission error), 1700s– porphyritic. β. 1600s–1700s porphyretick, 1700s porphyretic. Origin: A borrowing from Latin. Etymons: Latin porphyriticus; Latin porphyrēticus. Etymology: Originally partly (in α. forms) < post-classical Latin porphyriticus (from 12th cent. in British sources; see also quot. ?a1475 at sense 1) < classical Latin porphyrītēs porphyrite n.¹ + -icus -ic suffix; and partly (in β. forms) < classical Latin porphyrēticus (Suetonius: see quot. 1796 at sense 1) < Hellenistic Greek πορϕυριτικός < πορϕυρίτης (see porphyrite n.¹) + -ικός -ic suffix. In sense 2 apparently directly < porphyrite n.¹ + -ic suffix; compare -itic suffix. †1. Of, relating to, or of the nature of porphyry. Obsolete. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > ancient porphyry porphyritic?a1475 porphyrate1612 porphyrian1638 society > occupation and work > materials > raw material > gem or precious stone > rock crystal > [adjective] > porphyry porphyritic?a1475 porphyrate1612 porphyrian1638 ?a1475 (?a1425) tr. R. Higden Polychron. (Harl. 2261) (1874) V. 131 (MED) Themperour..made a fonte or baptistery of a ston prophiritike [read porphiritike; a1387 J. Trevisatr. a maner stoon þat hatte porphiriticus; L. lapide porphyritico]. 1656 T. Blount Glossographia Porphyretick, belonging to red Marble, or purple. 1677 E. Coles Eng. Dict. (new ed.) Porphyretick, belonging to purple, or to Porphyry. 1711 J. Bingham Origines Ecclesiasticae III. i. 218 Durantus indeed has a very formal Story..how Constantine gave a rich Font to the Church, wherein he himself was baptized; it was made, the Author says, of Porphyretick Marble, overlaid with Silver. 1796 A. Thomson tr. Suetonius Lives First Twelve Cæsars 470 A coffin, with an altar of porphyretic marble of Luna over it. 2. Geology. Of a rock or its texture: containing distinct crystals or crystalline particles embedded in a compact groundmass. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > porphyry porphyritic1791 porphyroid1798 porphyraceous1799 porphyric1824 phyric1958 1791 Philos. Trans. (Royal Soc.) 81 50 Lilleshall Hill near Shifnal, in Shropshire,..affords such siliceous, besides semi-granitic, porphyritic, and common whinstone, containing agate. 1799 R. Kirwan Geol. Ess. 303 It reposes on indurated clay, as this does on a porphyritic rock. 1858 H. D. Rogers Geol. Pennsylvania I. i. 69 This variety may be designated a porphyritic gneiss, having that feature of an excess of crystalline felspar which is accepted by geologists as a distinctive character of the porphyritic rocks. 1884 Leisure Hour June 356/2 Two sphinxes in the porphyritic diorite of Assouan. 1954 C. E. Tilley et al. Harker's Petrol. (ed. 8) i. 24 In some of the plutonic rocks, however, and especially among the granites, occur relatively large crystals of felspar, which give a porphyritic character to the rock of which they form part. 1970 Nature 25 July 365/2 The upper contact is gradational into porphyritic pyroxenite. 1990 C. Pellant Rocks, Minerals & Fossils 19/2 The texture is fine-grained but phenocrysts of plagioclase, often sanidine, commonly occur to give a porphyritic texture. Derivatives porphyˈritically adv. Geology (now rare) so as to form a porphyritic rock; as crystals in a porphyritic rock. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adverb] > porphyry porphyritically1851 1851 S. F. Baird tr. J. G. Heck Iconogr. Encycl. I. Geogn. 212 The glassy [trachytic lava] is formed by pumices and obsidian; it is either pure, or contains porphyritically separated particles of feldspar. 1886 Bull. U.S. Geol. Surv. No. 28. 53 Small rounded grains..in which crystals of the other minerals are porphyritically imbedded. 1909 Geogr. Jrnl. 34 520 The formations are surprisingly constant, the prevailing one being of metamorphic granite rock, traversed by quartz reefs. In some of these felspars occur porphyritically. This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022). < adj.?a1475
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