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hyperplasia

American  
[hahy-per-pley-zhuh, -zhee-uh, -zee-uh] / ˌhaɪ pərˈpleɪ ʒə, -ʒi ə, -zi ə /

noun

Pathology, Biology.

  1. abnormal multiplication of cells.

  2. enlargement of a part due to an abnormal numerical increase of its cells.

hyperplasia British  
/ ˌhaɪpəˈplæzɪə, ˌhaɪpəˈplæstɪk /

noun

  1. enlargement of a bodily organ or part resulting from an increase in the total number of cells Compare hypertrophy

"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

Other Word Forms

Etymology

Origin of hyperplasia

First recorded in 1860–65; hyper- + -plasia

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Low levels of a key hormone called 'cortisol' is typically a result of conditions such as Addison's and Congenital Adrenal Hyperplasia.

From Science Daily • Oct. 20, 2023

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.