in·fun·dib·u·lum (ĭnˌfən-dĭbˈyə-ləm)

1. A funnel or funnel-shaped structure or passage.
2. The infundibulum of the fallopian tube.
3. The expanding portion of a calix as it opens into the pelvis of the kidney.
4. See conus arteriosus.
5. A termination of a bronchiole in the alveolus.
6. Termination of the cochlear canal beneath the cupola.
7. The funnel-shaped, unpaired prominence of the base of the hypothalamus behind the optic chiasm, continuous below with the stalk of the pituitary gland.

Related Forms:

• inˌfun·dibˈu·lar (-lər), inˌfun·dibˈu·lateˌ (-lātˌ, -lĭt) adjective