[hahy-poh-pi-too-i-tuh-riz-uh m, -tyoo-]
noun Pathology.
  1. abnormally diminished activity of the pituitary gland, especially of the anterior lobe.
  2. the condition produced by this, characterized by obesity, retention of adolescent traits, sterility, amenorrhea, and, in extreme cases, dwarfism.

Origin of hypopituitarism

First recorded in 1905–10; hypo- + pituitar(y) + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for hypopituitarism


  1. pathol underactivity of the pituitary gland
Derived Formshypopituitary, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

hypopituitarism in Medicine


  1. Deficient or diminished production of pituitary hormones.
  2. The condition resulting from a deficiency in pituitary hormone, especially growth hormone, characterized by dwarfism in children.
Related formshy′po•pi•tui•tar′y (-tĕr′ē) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.