单词	supinator
释义	supinator noun su·​pi·​na·​tor ˈsü-pə-ˌnā-tər  : a muscle that produces the motion of supination Example Sentences Recent Examples on the Web There are three types of runners based on foot strike: overpronators (your feet roll inward too much), neutral pronators (feet roll inward slightly) and supinators (feet don’t roll inward enough, so most of the impact is on the outside of the foot). Danika Worthington, The Denver Post, 25 Mar. 2017 Word History Etymology New Latin, from Latin supinare First Known Use 1615, in the meaning defined above Medical Definition supinator noun su·​pi·​na·​tor ˈsü-pə-ˌnāt-ər  : a muscle that produces the motion of supination specifically : a deeply situated muscle of the forearm that arises in two layers from the lateral epicondyle of the humerus and adjacent parts of the ligaments and bones of the elbow and that passes over the head of the radius to insert into its neck and the lateral surface of its shaft
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