1. A narrow reflection or fold of mucous membrane passing from a more fixed to a movable part, serving to check undue movement of the part. 2. An anatomical structure resembling such a fold. SYN: bridle (1). [L. a bridle, curb]
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n.
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fre·num (freґnəm) pl. freґna [L. “bridleâ€] a restraining structure or part; see frenulum.Medical dictionary. 2011.