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The Collaborative International Dictionary
Hypocrystalline

Hypocrystalline \Hyp`o*crys"tal*line\, a. [Pref. hypo- + crystalline.] (Crystallog.) Partly crystalline; -- said of rock which consists of crystals imbedded in a glassy ground mass.

Wiktionary
hypocrystalline

a. (context geology of igneous rocks English) having both glass and crystalline components

Wikipedia
Hypocrystalline
  1. Redirect Crystallinity