Noun
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.
A central cavity in the Ctenophora, into which the gastric sac leads.
The siphon of Cephalopoda. See Cephalopoda.
Source: Webster's dictionaryThe posterior pituitary (or neurohypophysis) is a lobe of the gland that is functionally connected to the hypothalamus by the median eminence via a small tube called the pituitary stalk (also called the infundibular stalk or the infundibulum). Source: Internet
Veterinary medicine * Infundibulum (tooth) : In horses, other equines and ruminants, the infundibulum of a tooth is the central cup or funnel of tooth enamel and cementum. Source: Internet