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.
- Any of various funnel-shaped bodily passages, openings, structures, or parts, especially:
- The stalk of the pituitary gland.
- The calyx of a kidney.
- The ovarian opening of a fallopian tube.