anorthite

名词 anorthite:

1. rare plagioclastic feldspar occurring in many igneous rocks

an.or.thite

n.（名词）
A rare plagioclase feldspar with high calcium oxide content occurring in igneous rocks.
钙长石：一种氧化钙含量很高稀有斜长石，多出现于火成岩中

来源：
From Greek an- [not] * see a-
源自 希腊语 an- [不] *参见 a-
orthos [straight (from its oblique crystals)]
orthos [直的（从其斜状水晶）]