glottis
noun [ C usually singular ] anatomy specialized uk/ˈɡlɒt.ɪs/ us/ˈɡlɑː.t̬ɪs/ glottises /ˈɡlɒt.ɪs.ɪz/ /ˈɡlɑː.t̬ɪs.ɪz/ glottides /ˈɡlɒt.ɪ.diːz/ /ɡlɑː.t̬ɪ.diːz/
声门（人喉部声带间的区域）
the thin opening between the vocal cords at the top of the larynx (= the organ in the throat), that is closed by the epiglottis when you swallow