Having the shape or structure of a hinge joint, characterized by a restricted movement in one plane.
From Greek 'ginglymos' (hinge) + Latin 'forma' (form). The Greek root referred to the hinge of a door, and this anatomical term applies it to joints that move like hinges.
Your elbow is a ginglyform joint—it's why you can only bend it forward and backward, not twist side to side! The ancient Greeks literally named it after door hinges because the similarity was so obvious.
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