- deficient activity of the pituitary gland, esp. of its anterior lobe
- the condition resulting from this, characterized by decreased growth in children or decreased activity of the gonads, thyroid gland, or adrenal glands
- Deficient or diminished production of pituitary hormones.
- The condition resulting from a deficiency in pituitary hormone, especially growth hormone, characterized by dwarfism in children and sometimes by decreased activity of the thyroid, adrenal, or gonadal glands.
(usually uncountable, plural hypopituitarisms)
hypo- + pituitary + -ism