どんさん 呑酸 LinksSentence search for 呑酸Sentence search for どんさんSentence search for 吞酸Kanji details for 呑 and 酸Edit in JMdict Noun1. acid reflux; heart-burnMedicine, See also 胸焼け むねやけOther forms吞酸 【どんさん】Notes吞酸: Out-dated kanji or kanji usage. Discussions Log in to talk about this word.