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单词 centrallasite
释义

centrallasiten.

Brit. /sɛnˈtraləsʌɪt/, U.S. /sɛnˈtræləˌsaɪt/
Forms: 1800s centralasite, 1800s centralassite, 1800s– centrallassite, 1800s– centrallasite.
Origin: A borrowing from Greek, combined with an English element. Etymons: Greek κέντρον , Greek ἀλλάσσειν , -ite suffix1.
Etymology: < ancient Greek κέντρον centre n.1 + ἀλλάσσειν to change (see allactite n.) + -ite suffix1. The mineral is so called because its change of colour to white begins at the centre.
Mineralogy. Now disused.
A hydrous silicate of lime, subsequently identified with gyrolite.
ΚΠ
1859 H. How in Edinb. New Philos. Jrnl. 10 88 Centrallassite is white, sometimes yellowish, translucent, perfectly transparent in thin plates.
1876 London, Edinb., & Dublin Philos. Mag. 5th Ser. 1 133 It may seem that I should be led to the view that centrallassite is really gyrolite.
1924 Amer. Mineralogist 9 89 The centrallasite often has a core of quartz.
1976 A. Roe & J. S. White Catal. Type Specimens Mineral Coll., National Mus. Nat. Hist. 8/1 Centrallasite (discredited, = Gyrolite) NMNH R4043 King's County, Nova Scotia, Canada.
This entry has been updated (OED Third Edition, June 2016; most recently modified version published online December 2021).
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n.1859
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