miarolitic
/ˌmiːərə(ʊ)ˈlɪtɪk/Geology
adjective
Of an igneous rock or its structure: characterized by irregular cavities into which crystals project.
Origin
Late 19th century; earliest use found in Quarterly Journal of the Geological Society of London. From German miarolit- (in miarolitisch from Miarolit a type of granite + -isch) + -ic. German Miarolit is from Italian (northern) miarolo a type of granite from the Lake Maggiore area in northern Italy (from Italian regional (Lombardy) miaroeu granite) + German -lit.