しょうえんはんおう 硝煙反応 LinksSentence search for 硝煙反応Sentence search for しょうえんはんおうKanji details for 硝, 煙, 反 and 応Edit in JMdict Noun1. chemical reaction used to detect residue from gunshotsNoun2. gunpowder residue; gun shot residue; GSRColloquial Discussions Log in to talk about this word.