tricuspid valve
noun [ C usually singular ] anatomy specialized uk/traɪˈkʌs.pɪd ˌvælv/ us/traɪˈkʌs.pɪd ˌvælv/
（心脏的）三尖瓣
the valve (= structure that opens and closes) in the heart that stops blood from returning into the right atrium (= upper space) from the right ventricle (= lower space)
Compare: mitral valve