上じょう腕わん三さん頭とう筋きんMeaningsNoun1. triceps brachii muscleKanji used上above腕arm三three頭head筋muscleComposed of上じょう腕わんupper armNoun三さんthree; 3Numeric頭とうcounter for large animals (e.g. head of cattle); counter for insects in a collection; counter for helmets, masks, etc.Counter筋きんmuscleNoun