1. One of a pair of tubes that carry urine from primitive or embryonic kidneys to the exterior or to a primitive bladder. In amphibians the reproductive system encroaches on the Wolffian duct; in some species the duct carries both urine and sperm, but most amphibians develop a separate tube to carry urine from the kidney. (global.britannica.com)
2. The duct of the mesonephros that persists in the female chiefly as part of a vestigial organ and in the male as the duct system leaving the testis and including the epididymis, vas deferens, seminal vesicle, and ejaculatory duct. (merriam-webster.com)
3. A paired organ found in mammals including humans during embryogenesis. (wikipedia.org)
Syn: archinephric duct, Leydig’s duct, nephric duct, mesonephric duct