tachylyte
noun
tachy·lyte
variants or less commonly tachylite
ˈtakə̇ˌlīt
plural -s
: basalt glass
Word History
Etymology
tachylyte from German tachylyt, from tachy- + Greek lytos soluble, from lyein to unbind, release, dissolve; tachylite alteration (influenced by -lite) of tachylyte