INFUNDIBULUM

[in.fun.dib.u.lum] n, pl -la [NL, fr. L, funnel--more at funnel] (1543): any of various funnel-shaped organs or parts: as a: the hollow conical process of gray matter by which the pituitary gland is continuous with the brain b: the calyx of a kidney c: the abdominal opening of a fallopian tube