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tachylyte

American

[tak-uh-lahyt] / ˈtæk əˌlaɪt /

Or tachylite

noun

Petrography.

a black, glassy form of basalt, readily fusible and of a high luster.

tachylyte British

/ ˈtækɪˌlaɪt, ˌtækɪˈlɪtɪk /

noun

a black basaltic glass often found on the edges of intrusions of basalt

"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

Other Word Forms

tachylitic adjective
tachylytic adjective

Etymology

Origin of tachylyte

First recorded in 1865–70; tachy- + -lyte ²

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023