Definition of monomineral in English:

monomineral

Pronunciation /ˌmɒnə(ʊ)ˈmɪn(ə)rəl/ /ˌmɒnə(ʊ)ˈmɪn(ə)r(ə)l/

adjective

Geology

Origin

Early 20th century; earliest use found in Geological Magazine. From mono- + mineral.