焦しょう性せい硫りゅう酸さんしょうせいりゅうさんじ字FuriganaMeanings1nounpyrosulfuric acid; pyrosulphuric acidTechnical term in chemistry; also known as disulfuric acid or oleum when containing excess sulfur trioxide.焦しょう性せい硫りゅう酸さんは強つよい脱だっ水すい作さ用ようを持もつ。