最終更新日：2024/08/05

(geology) A slate consisting mainly of clay, iron pyrites, and coaly matter, from which alum is obtained.

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alum slate

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元となった辞書の項目

alum slate

noun

(geology) A slate consisting mainly of clay, iron pyrites, and coaly matter, from which alum is obtained.

The roof of the house was made of alum slate.

意味（1）

(geology) A slate consisting mainly of clay, iron pyrites, and coaly matter, from which alum is obtained.