anorthite

Etymology
From +  "not perpendicular; less than straight", in reference to its odd.

Noun

 * 1)  A variety of plagioclase feldspar, the calcium endmember of that series.

Translations

 * Catalan: anortita
 * Finnish: anortiitti
 * Italian: anortite
 * Japanese: 灰長石
 * Polish:
 * Portuguese: anortita
 * Serbo-Croatian:
 * Spanish: anortita