sulcus terminalis

noun
sulcus ter·​mi·​na·​lis | \ -ˌtər-mə-ˈnā-ləs How to pronounce sulcus terminalis (audio) \
plural sulci terminales\ -​ˌlēz How to pronounce sulci terminales (audio) \

Medical Definition of sulcus terminalis

1 : a V-shaped groove separating the anterior two thirds of the tongue from the posterior third and containing the circumvallate papillae
2 : a shallow groove on the outside of the right atrium of the heart

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