pennantite

Noun

(mineralogy) A monoclinic-prismatic mineral containing aluminum, hydrogen, manganese, oxygen, and silicon.

Japanese Meaning

ペナンタイタ：単斜晶系のプリズム状鉱物で、アルミニウム、水素、マンガン、酸素、ケイ素を含む鉱物

The geologist carefully examined a sample of pennantite under the microscope to study its crystal structure.

地質学者は結晶構造を調べるために、アルミニウム、水素、マンガン、酸素、ケイ素を含む単斜晶系の柱状鉱物の試料を顕微鏡で注意深く調べた。

Sense（1）

(mineralogy) A monoclinic-prismatic mineral containing aluminum, hydrogen, manganese, oxygen, and silicon.