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Medical Definition of Ampullary sulcus
1. The groove on the external surface of the ampulla of each semicircular duct where the nerve enters the crista ampullaris. Synonym: sulcus ampullaris. (05 Mar 2000)
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1. The groove on the external surface of the ampulla of each semicircular duct where the nerve enters the crista ampullaris. Synonym: sulcus ampullaris. (05 Mar 2000)