hypocrystalline


Also found in: Dictionary, Wikipedia.

hypocrystalline

[¦hī·pō′krist·əl·ən]
(petrology)
Pertaining to the texture of igneous rock characterized by crystalline components in an amorphous groundmass. Also known as hemicrystalline; hypohyaline; merocrystalline; miocrystalline; semicrystalline.