Tachylyte definition
A brown, black, or green volcanic glass formed from basaltic magma and often found along the edges of dikes, sills or volcanic flows, where rock usually forms first by contact with the cooler surrounding rock.
noun
A kind of dark-colored, basaltic volcanic glass.
noun
Alternative Forms
Alternative Form of tachylyte -
tachylite
Other Word Forms
Noun
Singular:
tachylyte
Plural:
tachylytesOrigin of tachylyte
- German Tachylyt Greek takhu- tachy- Greek lutos soluble (from lūein to loosen leu- in Indo-European roots)
From American Heritage Dictionary of the English Language, 5th Edition