ankaratrite
noun
an·ka·ra·trite
-ä‧ˌtrīt
plural -s
: a melanocratic nephelite-basalt containing some feldspar, phenocrysts of olivine, microlites of titanaugite, and from 10 to 15 percent nephelite
Word History
Etymology
French ankaratrite, from Ankaratra mountains, Madagascar, its locality + French -ite
First Known Use
1916, in the meaning defined above