Incomplete or arrested development of an organ or a part.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "hypoplasia" in a sentence
"If she falls over when blindfolded (because she relies on her eyes for balance), she probably has cerebellar hypoplasia, which is more common in kittens."
"Macie Morse was born with optic nerve hypoplasia, meaning her optic nerve didn't develop all the way."
"We also observed other phenotypes commonly associated with RP morphants , such as hypoplasia of the yolk sac extension, abnormalities in the ear, and delayed pigmentation of the eyes."