D defs.my
Entry 1 sense Webster, 1913

Hypocrystalline

· Hyp·o·crys·tal·line · IPA
01 a. Partly crystalline; -- said of rock which consists of crystals imbedded in a glassy ground mass.
  1. 1.
    Partly crystalline; -- said of rock which consists of crystals imbedded in a glassy ground mass.(Crystallog.)