Definition of quadriceps noun from the Oxford Advanced Learner's Dictionary

 

quadriceps

 noun
noun
BrE BrE//ˈkwɒdrɪseps//
 
; NAmE NAmE//ˈkwɑːdrɪseps//
 
(pl. quadriceps)(informal quads)(anatomy)
 
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the large muscle at the front of the thigh Word Origin mid 16th cent.: from Latin, literally ‘four-headed’.
See the Oxford Advanced American Dictionary entry: quadriceps