cryptocrystalline

== English == === Etymology === From crypto- + crystalline. === Adjective === cryptocrystalline (not comparable) (petrology) Whose crystalline nature only becomes apparent at high levels of magnification. ==== Derived terms ==== ==== Translations ==== === Noun === cryptocrystalline (countable and uncountable, plural cryptocrystallines) (petrology) A rock of this kind.