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Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Lack of secretion or expulsion of semen following ejaculation.
Farlex Partner Medical Dictionary © Farlex 2012
Inability to produce or ejaculate semen.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
aspermiaThe absence of spermatozoa in the semen or the inability to ejaculate semen. Obstructive aspermia is due to the blockage of the VAS DEFERENS on both sides. This may be congenital or acquired from infection or injury, or from VASECTOMY. CYSTIC FIBROSIS causes aspermia as a result of failure of development of the vas or associated structures.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005