Pronunciation: (hī"pō-pi-tOO'i-tu-riz"um, -tyOO'-), [key]
1. abnormally diminished activity of the pituitary gland, esp. of the anterior lobe.
2. the condition produced by this, characterized by obesity, retention of adolescent traits, sterility, amenorrhea, and, in extreme cases, dwarfism.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.