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2017 Word of the Year

tachylyte

or tachylite

[tak-uh-lahyt] /ˈtæk əˌlaɪt/
noun, Petrography.
1.
a black, glassy form of basalt, readily fusible and of a high luster.
Origin of tachylyte
1865-1870
First recorded in 1865-70; tachy- + -lyte2
Related forms
tachylitic
[tak-uh-lit-ik] /ˌtæk əˈlɪt ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for tachylyte

tachylyte

/ˈtækɪˌlaɪt/
noun
1.
a black basaltic glass often found on the edges of intrusions of basalt
Derived Forms
tachylytic (ˌtækɪˈlɪtɪk), tachylitic, adjective
Word Origin
C19: from German Tachylit, from tachy- + Greek lutos soluble, melting, from luein to release; so called because it fuses easily when heated. The form tachylite is influenced by -lite stone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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