orthophyricadj.

Brit.

/ˌɔːθə(ʊ)ˈfɪrɪk/, U.S.

/ˌɔrθoʊˈfɪrɪk/

Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: orthophyre n., -ic suffix.

Etymology: < orthophyre n. + -ic suffix, after German orthophyrisch (H. Rosenbusch Mikrosk. Physiogr. (ed. 2, 1887) II. 594).

Geology.

Characterized by or designating a rock texture in which there is a groundmass of randomly oriented, short, stout feldspar crystals of rectangular or square cross-section.

ΘΚΠ

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

vitrophyric1890

orthophyric1895

granophyric1897

1895 A. Harker Petrol. viii. 102 Other porphyrites have the ‘orthophyric’ type of ground~mass (with short felspar-prisms), as in the porphyries.

1964 G. A. Joplin Petrogr. Austral. Igneous Rocks v. 65 Most trachytes are porphyritic with phenocrysts of anorthoclase in an orthophyric and/or trachytic ground~mass.

1983 S. I. Tomkeieff et al. Dict. Petrol. at Orthophyre The name survives as the orthophyric texture in which the orthoclase crystals show short rectangular cross-sections randomly arranged.

This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).

单词	orthophyric
释义	orthophyricadj. Brit. /ˌɔːθə(ʊ)ˈfɪrɪk/, U.S. /ˌɔrθoʊˈfɪrɪk/ Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: orthophyre n., -ic suffix. Etymology: < orthophyre n. + -ic suffix, after German orthophyrisch (H. Rosenbusch Mikrosk. Physiogr. (ed. 2, 1887) II. 594). Geology. Characterized by or designating a rock texture in which there is a groundmass of randomly oriented, short, stout feldspar crystals of rectangular or square cross-section. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > porphyry > subdivision vitrophyric1890 orthophyric1895 granophyric1897 1895 A. Harker Petrol. viii. 102 Other porphyrites have the ‘orthophyric’ type of ground~mass (with short felspar-prisms), as in the porphyries. 1964 G. A. Joplin Petrogr. Austral. Igneous Rocks v. 65 Most trachytes are porphyritic with phenocrysts of anorthoclase in an orthophyric and/or trachytic ground~mass. 1983 S. I. Tomkeieff et al. Dict. Petrol. at Orthophyre The name survives as the orthophyric texture in which the orthoclase crystals show short rectangular cross-sections randomly arranged. This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022). < adj.1895
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