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Meaning of Wolffian duct

Wolff'ian duct'

Pronunciation: [key]
— Embryol. (sometimes l.c.)Embryol.
  1. a duct, draining the mesonephros of the embryo, that becomes the vas deferens in males and vestigial in females.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.