miarolitic
adjective
mi·a·ro·lit·ic
¦mēərō¦litik
1
of igneous rock : characterized by irregular cavities into which well-formed crystals project
miarolitic structure
miarolitic granites
2
of a cavity : having an irregular form into which such crystals project
Word History
Etymology
International Scientific Vocabulary miaro- (from Italian dialect miarolo granite with small cavities) + -litic