anorthite

[ an-awr-thahyt ]
/ ænˈɔr θaɪt /

noun Mineralogy.

a white or gray feldspar mineral, CaAl2Si2O8, calcic plagioclase.

Origin of anorthite

First recorded in 1825–35; an-1 + orth- + -ite1

OTHER WORDS FROM anorthite

an·or·thit·ic [an-awr-thit-ik] /ˌæn ɔrˈθɪt ɪk/, adjective

Example sentences from the Web for anorthite

British Dictionary definitions for anorthite

anorthite
/ (ænˈɔːθaɪt) /

noun

a white to greyish-white or reddish-white mineral of the feldspar group and plagioclase series, found chiefly in igneous rocks and more rarely in metamorphic rocks. It is used in the manufacture of glass and ceramics. Composition: calcium aluminium silicate. Formula: CaAl 2 Si 2 O 8 . Crystal structure: triclinic

Derived forms of anorthite

anorthitic (ˌænɔːˈθɪtɪk), adjective

Word Origin for anorthite

C19: from an- + ortho- + -ite 1

Scientific definitions for anorthite

anorthite
[ ăn-ôrthīt ]

A white to gray triclinic mineral of the plagioclase feldspar group. Anorthite is the plagioclase mineral that is richest in calcium and occurs in alkaline igneous rocks such as gabbro. Chemical formula: CaAl2Si2O8.