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单词 proteolite
释义

proteoliten.

Origin: Formed within English, by compounding. Etymons: Proteus n., -lite comb. form1.
Etymology: < proteo- , taken as combining form of Proteus n. (compare -o- connective) + -lite comb. form1 (see quot. 1832). N.E.D. (1909) gives the pronunciation as (prōu·tiˌoləit) /ˈprəʊtiːəʊlaɪt/.
Geology. Obsolete.
A granular metamorphic rock, usually a type of hornfels or other product of contact metamorphism, with or without mica and tourmaline. Cf. cornubianite n.
ΚΠ
1832 H. S. Boase in Trans. Royal Geol. Soc. Cornwall 4 394 In many parts of Cornwall the schistose rocks adjoining the granite have a basis more granular than that of cornubianite; are much softer, and more prone to disintegrate:..these may be referred to a distinct genus which may be called proteolite.
1879 F. Rutley Study of Rocks xii. 213 Cornubianite (proteolite) is a compact granular-scaly condition of gneiss.
1886 T. G. Bonney in Q. Jrnl. Geol. Soc. 42 104 We might define Cornubianite as essentially consisting of quartz, mica and tourmaline, and revive the term Proteolite for rocks consisting essentially of quartz, mica and andalusite.
This entry has been updated (OED Third Edition, June 2007; most recently modified version published online June 2018).
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n.1832
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