D defs.my
Menu ☰
Entry 1 sense Webster, 1913

Cryptocrystalline

/(-kr?s"tal-l?n)/ · Cryp·to·crys·tal·line · IPA
01 a. Indistinctly crystalline; -- applied to rocks and minerals, whose state of aggregation is so fine that no distinct particles are visible, e…
  1. 1.
    Indistinctly crystalline; -- applied to rocks and minerals, whose state of aggregation is so fine that no distinct particles are visible, even under the microscope.(Geol.)