[ 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

First recorded in 1905–10; hypo- + pituitar(y) + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for hypopituitarism


/ (ˌhaɪpəpɪˈtjuːɪtəˌrɪzəm) /


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

Medicine definitions for hypopituitarism


[ hī′pō-pĭ-tōōĭ-tə-rĭz′əm ]


Deficient or diminished production of pituitary hormones.
The condition resulting from a deficiency in pituitary hormone, especially growth hormone, characterized by dwarfism in children.

Related forms

hy′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.