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concussionOne entry found. Main Entry: con·cus·sion Pronunciation: \kən-ˈkə-shən\ Function: noun Etymology: Middle English concussioun, from Latin concussion-, concussio, from concutere to shake violently, from com- + quatere to shake Date: 14th century 1 a : a stunning, damaging, or shattering effect from a hard blow; especially : a jarring injury of the brain resulting in disturbance of cerebral function b : a hard blow or collision synonyms see impact — con·cus·sive \-ˈkə-siv\ adjective
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