diverticulum [ˌdʌɪvəˈtɪkjʊləm] (pl. diverticula -lə)
(Anatomy & Zoology)a blind tube leading from a cavity or passage (剖,动)膨部,支囊,憩室 ■(Medicine)an abnormal sac or pouch formed at a weak point in the wall of the alimentary tract (医)消化道憩室病
语源
early 19th cent.: from medieval Latin, variant of Latin deverticulum 'byway', from devertere 'turn down or aside'