a prenatal or postnatal condition in which one testis is absent or has not descended into the scrotum.
Also mo·nor·chism [muh-nawr-kiz-uh m] /məˈnɔr kɪz əm/.
Origin of monorchidism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
A condition in which only one testis is apparent, the other being absent or undescended.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.