dacite

noun

da·​cite

ˈdāˌsīt

plural -s

: an extrusive rock that is sometimes partly glassy and is composed of plagioclase and quartz with biotite, hornblende, or pyroxene

dacitic

(ˈ)dā¦sitik

adjective

Word History

Etymology

German dazit, from Dazien Dacia + German -it -ite

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