anhydride; anhydrous compound
Chemistry term for a compound from which water has been removed, or an oxide that forms an acid or base when combined with water.
Anhydrides can react with water to produce acids or bases.
This reagent must be stored as an anhydrous compound.
Compound of 無水 (むすい, 'anhydrous') + 物 (ぶつ, 'substance'). The term is a direct calque from Western chemistry terminology.