Tachylyte

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Tachylyte \Tach"y*lyte\, n. [Gr. tachy`s quick + ly`ein to
     dissolve.] (Min.)
     A vitreous form of basalt; -- so called because decomposable
     by acids and readily fusible.
     [1913 Webster]