Share this entry
anorthite Line breaks: anorth|ite
Pronunciation: /əˈnɔːθʌɪt/

Definition of anorthite in English:


[mass noun]
A calcium-rich mineral of the feldspar group, typically white, occurring in many basic igneous rocks.
Example sentences
  • Because of the preponderance of the mineral anorthite (a calcium-rich variety of the mineral plagioclase feldspar) this rock type is called anorthosite.
  • Late phases are mainly calcic amphiboles of magnesio-hornblende composition and plagioclases with very low anorthite contents.
  • The relative effect of anorthite on predicted melt compositions is indicated.


Mid 19th century: from an-1 + Greek orthos 'straight' + -ite1.

Definition of anorthite in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources