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ejaculatory duct n.
The duct that is formed by the union of the deferent duct and the excretory duct of the seminal vesicle and opens into the prostatic urethra. Also called spermiduct.
either of two hollow tubes, each formed by union of the ampulla of a ductus deferens (q.v.) and the excretory duct of a seminal vesicle (q.v.). The ducts, which open into the urethra about halfway through the prostate gland (q.v.), function to mix the sperm stored in the ampulla with fluids secreted by the seminal vesicles and to transport these substances to the prostate