[ uh-pley-zhuh ]
/ əˈpleɪ ʒə /

noun Pathology.

defective development or congenital absence of a limb, organ, or other body part.

Origin of aplasia

First recorded in 1880–85; a-6 + -plasia

Related forms

a·plas·tic [ey-plas-tik] /eɪˈplæs tɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for aplasia


/ (əˈpleɪzɪə) /


pathol congenital absence or abnormal development of an organ or part

Word Origin for aplasia

C19: New Latin, from a- 1 + -plasia, from Greek plassein to form
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 aplasia


[ ə-plāzhə ]


Congenital absence of an organ or tissue.
Incomplete, retarded, or defective development of an organ or tissue.
Cessation of the usual regenerative process in an organ or tissue.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.