perliticadj.

Brit.

/pəːˈlɪtɪk/, U.S.

/ˌpərˈlɪdɪk/

Forms: 1800s pearlitic, 1800s– perlitic.

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

Etymology: < perlite n. + -ic suffix, perhaps after French perlitique (1878).With the form pearlitic compare perlite n. (see forms s.v.).

Geology.

Of, relating to, or distinctive of perlite; spec. designating a structure in natural glasses characterized by concentric spheroidal cracks.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > volcanic > lava > vitreous

obsidian1601

semi-vitreous1813

perlitic1879

pyroxenitic1914

1879 F. Rutley Study of Rocks xi. 183 Showing that the perlitic structure had no existence when the rock was in a state of fluxion.

1879 Amer. Naturalist 13 400 A pearlitic and sphærulitic structure.

1932 A. Johannsen Descr. Petrogr. Igneous Rocks II. 284 The cause of the perlitic texture is the strain set up in the glass by cooling.

1995 Amer. Antiq. 60 535/2 Marekanites were directly associated with glassy, perlitic rhyolite in Ewe Canyon to the south.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	perlitic
释义	perliticadj. Brit. /pəːˈlɪtɪk/, U.S. /ˌpərˈlɪdɪk/ Forms: 1800s pearlitic, 1800s– perlitic. Origin: Formed within English, by derivation; perhaps modelled on a French lexical item. Etymons: perlite n., -ic suffix. Etymology: < perlite n. + -ic suffix, perhaps after French perlitique (1878).With the form pearlitic compare perlite n. (see forms s.v.). Geology. Of, relating to, or distinctive of perlite; spec. designating a structure in natural glasses characterized by concentric spheroidal cracks. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > volcanic > lava > vitreous obsidian1601 semi-vitreous1813 perlitic1879 pyroxenitic1914 1879 F. Rutley Study of Rocks xi. 183 Showing that the perlitic structure had no existence when the rock was in a state of fluxion. 1879 Amer. Naturalist 13 400 A pearlitic and sphærulitic structure. 1932 A. Johannsen Descr. Petrogr. Igneous Rocks II. 284 The cause of the perlitic texture is the strain set up in the glass by cooling. 1995 Amer. Antiq. 60 535/2 Marekanites were directly associated with glassy, perlitic rhyolite in Ewe Canyon to the south. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < adj.1879
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