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硬石膏 (kousekkou) Japanese meaning: anhydrite | Kotomora

硬こう石せっ膏こう

こ

う

せ

っ

こ

う

Meanings

1

anhydrite

A mineral composed of anhydrous calcium sulfate (CaSO₄). Used in geology and mineralogy.

硬こう石せっ膏こうは石せっ膏こうと異ことなり、結けっ晶しょう水

すい

を

含ふく

ま

ない

。

Anhydrite, unlike gypsum, contains no water of crystallization.

Kanji

硬stiff, hard
石stone
膏fat, grease, lard

Related words

石せっ膏こう
石膏 (gypsum) is the hydrated calcium sulfate mineral, while 硬石膏 (anhydrite) is the anhydrous form.

Etymology

From 硬 (hard) + 石膏 (gypsum), referring to its hardness relative to gypsum and its anhydrous composition.