点てん突とつ然ぜん変へん異いMeaningsNoun1. point mutationKanji used点point突thrust然sort of thing変change異differentComposed of点てんdot; spot; point; speck; mark; mark (in an exam, etc.); grade; score; points; point (in a game); …Noun突とつ然ぜん変へん異いmutationNoun