basalt

詳細解釋：

ba.salt

n.（名詞）
A hard, dense, dark volcanic rock composed chiefly of plagioclase, pyroxene, and olivine, and often having a glassy appearance.
玄武岩：一種硬的、緻密的、黑色的火山岩。它主要由斜長石、輝石和橄欖石組成，外表經常很光滑
A kind of hard unglazed pottery.
一種硬的素燒的陶器

來源：
Latin basaltôs
拉丁語 basaltôs
alteration of basanotôs [touchstone]
basanotôs的變化 [試金石]
from Greek basanitôs (lithos)
源自 希臘語 basanitôs (lithos)
from basanos
源自 basanos
[of Egyptian origin]
[源於埃及的]

【引伸】
basal.tic