Bible Dictionaries
Tachylyte

Webster's Dictionary

(n.) A vitreous form of basalt; - so called because decomposable by acids and readily fusible.

Bibliography Information
Webster, Noah. Entry for 'Tachylyte'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/tachylyte.html. 1828.