Meaning of microgranitoid in English:

microgranitoid

Pronunciation /ˌmʌɪkrə(ʊ)ˈɡranɪtɔɪd/

adjective

rare Geology

Origin

Early 20th century; earliest use found in Archibald Geikie (1835–1924), geologist and historian. From micro- + granitoid.