Azoospermic: containing no sperm. This adjective is typically used to describe the semen of men when no sperm (spermatozoa) are present. Azoospermia is the condition of having no sperm and affects about 1% of men. Azoospermia is a cause of male infertility. About 10%-15% of infertile men are found to have azoospermia.
Gudeloglu, A. et al. "Update in the evaluation of the azoospermic male." Clinics (Sao Paulo). 2013 Feb; 68(Suppl 1): 27–34. doi: 10.6061/clinics/2013(Sup01)04