INFUNDIBULUM

‖In′fun‐dib″u‐lum (?), n.; pl. L. Infundibula (#), E. Infundibulums (#). [[L., a funnel, from infundere to pour in or into. See Infuse.]] 1. 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.
2. 2. (Zoöl.) (a) A central cavity in the Ctenophora, into which the gastric sac leads. (b) The siphon of Cephalopoda. See Cephalopoda.