亜あ硝しょう酸さんMeaningsNoun1. nitrous acidKanji used亜Asia硝nitric酸acidPitch accentあしょうさんComposed of亜あsub-; second-rate; inferior; -ous (indicating a low oxidation state); -ite; Asia; Argentina; ArabiaPrefix硝しょう酸さんnitric acidNoun