Share this entry

anorthosite Syllabification: an·or·tho·site
Pronunciation: /əˈnôrTHəˌsīt/

Definition of anorthosite in English:

noun

Geology
A plutonic rock composed largely of calcic plagioclase.
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.
  • Coarse-grained anorthosite is the predominant rock type in these bodies.
  • The plagioclase crystals would have formed subcircular lenses of anorthosite that punctuated background chromite accumulation.

Origin

Mid 19th century: from French anorthose 'plagioclase' + -ite1.

Definition of anorthosite 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.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day luxe
Pronunciation: ləks
adjective
expensive and of high quality; luxurious