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[hahy-poh-pi-too-i-tuh-riz-uh m, -tyoo-] /ˌhaɪ poʊ pɪˈtu ɪ təˌrɪz əm, -ˈtyu-/
noun, Pathology
abnormally diminished activity of the pituitary gland, especially of the anterior lobe.
the condition produced by this, characterized by obesity, retention of adolescent traits, sterility, amenorrhea, and, in extreme cases, dwarfism.
Origin of hypopituitarism
1905-10; hypo- + pituitar(y) + -ism Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for hypopituitarism
  • As the tumor grows, hormone-releasing cells of the pituitary may be damaged, causing hypopituitarism.
  • In contrast to healthy subjects, patients with hypopituitarism do not exhibit endocrine responses when hormones are injected.
British Dictionary definitions for hypopituitarism


(pathol) underactivity of the pituitary gland
Derived Forms
hypopituitary, 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
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hypopituitarism in Medicine

hypopituitarism hy·po·pi·tu·i·ta·rism (hī'pō-pĭ-tōō'ĭ-tə-rĭz'əm, -tyōō'-)

  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.

hy'po·pi·tu'i·tar'y (-těr'ē) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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