chalcopyrite
(mineralogy) A yellow mineral that is a mixed sulfide of copper and iron, with the chemical formula CuFeS₂.
(transitive) To arrange (e.g. new-made hay) in lines or windrows.
(anatomy) The groove between the buttocks that runs from just below the sacrum to the perineum.
plural of built-in type
地質学者は鉱山で見つかった黄銅鉱（CuFeS2）の塊を丁寧に分類し、その真鍮のような光沢と石英との共生を記録した。
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