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triceps

noun
🔊/ˈtraɪseps/
🔊/ˈtraɪseps/
(plural triceps)
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  1. the large muscle at the back of the top part of the arm三头肌 compare bicepsTopics Bodyc2
    Oxford Collocations DictionaryTriceps is used before these nouns:
    • workout
    See full entry
    Word Originlate 16th cent.: from Latin, literally ‘three-headed’, from tri- ‘three’ + -ceps (from caput ‘head’).