JMdict: 1771280

虫酸 【むしず】

  1. [n] stomach acid that flows backwards into the mouth (due to acid reflux)
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
虫 Insect, Bug, Temper チュウ, キ むし
酸 Acid, Bitterness, Sour, Tart サン す.い