‖n.; pl. L. Infundibula E. Infundibulums [ L., a funnel, from infundere to pour in or into. See Infuse. ] 1. (Anat.) A funnel-shaped or dilated organ or part; as, the infundibulum of the brain, a hollow, conical process, connecting the floor of the third ventricle with the pituitary body; the infundibula of the lungs, the enlarged terminations of the bronchial tubes. [ 1913 Webster ]

2. (Zool.) (a) A central cavity in the Ctenophora, into which the gastric sac leads. (b) The siphon of Cephalopoda. See Cephalopoda. [ 1913 Webster ]