a black, glassy form of basalt, readily fusible and of a high luster.
Origin of tachylyte
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a black basaltic glass often found on the edges of intrusions of basalt
Word Origin for tachylyte
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