Definition of anorthite in English:

anorthite

noun

mass noun
  • A calcium-rich mineral of the feldspar group, typically white, occurring in many basic igneous rocks.

    • ‘Late phases are mainly calcic amphiboles of magnesio-hornblende composition and plagioclases with very low anorthite contents.’
    • ‘Because of the preponderance of the mineral anorthite (a calcium-rich variety of the mineral plagioclase feldspar) this rock type is called anorthosite.’
    • ‘The relative effect of anorthite on predicted melt compositions is indicated.’
    • ‘Lunar settlers could extract oxygen from the minerals ilmenite and anorthite.’

Origin

Mid 19th century: from an- + Greek orthos ‘straight’ + -ite.

Pronunciation

anorthite

/əˈnɔːθʌɪt/