azoospermiaPronunciation: /ˌeɪzəʊəˈspəːmɪə, əˈzəʊ-/Definition of azoospermia noun [mass noun] Medicine absence of motile (and hence viable) sperm in the semen. Derivatives azoospermic adjective azoospermia in other Oxford dictionaries Definition of azoospermia in the US English dictionary