Cryptocrystalline

1 definition found

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

  Cryptocrystalline \Cryp`to*crys"tal*line\ (-kr?s"tal-l?n), a.
     [Gr. krypto`s hidden + E. crystalline.] (Geol.)
     Indistinctly crystalline; -- applied to rocks and minerals,
     whose state of aggregation is so fine that no distinct
     particles are visible, even under the microscope.
     [1913 Webster]