Definition of deltoids noun from the Oxford Advanced American Dictionary

 

deltoids

 noun
noun
NAmE//ˈdɛltɔɪdz//
 
(informal delts
NAmE//dɛlts//
 
)
[plural](anatomy)
 
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thick muscles in the shape of triangles that cover the shoulder joints
See the Oxford Advanced Learner's Dictionary entry: deltoids