epiglottis UK /ˌɛp.ɪˈɡlɒt.ɪs/US /ˌɛp.ɪˈɡlɑ.tɪs/ noun1 •A cartilaginous organ in the throat of terrestrial vertebrates covering the glottis when swallowing to prevent food and liquid from entering the trachea, and in Homo sapiens also a speech organ.My epiglottis is full of bees! — 2004 formsepiglottides · epiglottises