basalt

名词 basalt:

1. the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene

ba.salt

n.（名词）
A hard, dense, dark volcanic rock composed chiefly of plagioclase, pyroxene, and olivine, and often having a glassy appearance.
玄武岩：一种硬的、致密的、黑色的火山岩。它主要由斜长石、辉石和橄榄石组成，外表经常很光滑
A kind of hard unglazed pottery.
一种硬的素烧的陶器

来源：
Latin basaltôs
拉丁语 basaltôs
alteration of basanotôs [touchstone]
basanotôs的变化 [试金石]
from Greek basanitôs (lithos)
源自 希腊语 basanitôs (lithos)
from basanos
源自 basanos
[of Egyptian origin]
[源于埃及的]

【引伸】
basal.tic