硝しょう煙えん反はん応のうMeaningsNoun1. chemical reaction used to detect residue from gunshotsShow all meanings (1 more)Kanji used硝nitric煙smoke反be against応respond with actionComposed of硝しょう煙えんgunpowder smokeNoun反はん応のうreaction; response; physical reaction (to a stimulus); observable response (of an organism); effect; changeNoun