Wolffian duct

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noun (sometimes lowercase)Embryology.

a duct, draining the mesonephros of the embryo, that becomes the vas deferens in males and vestigial in females.

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Origin of Wolffian duct

1875–80; named after K. F. Wolff; see -ian

With a bit of luck and duct tape, I thought we might put together enough votes to avoid a runoff.
How Thad Cochran Pulled Off a Win Over Chris McDaniel (Simple, Really)|Stuart Stevens|June 30, 2014|DAILY BEAST
The windows were sealed shut around the edges by duct tape but still rattled when it got windy.
Almost Famous: A Father's Day Story|Alex Belth|June 15, 2014|DAILY BEAST
He binds the little flyer with black plastic ties and seals her mouth with duct tape.
The Stacks: The Searing Story of How Murder Stalked a Tiny New York Town|E. Jean Carroll|April 19, 2014|DAILY BEAST
Nobody was allowed in his room, where the windows were covered with black garbage bags secured with duct tape.
We Already Know What Adam Lanza’s Real Motive Was at Sandy Hook|Michael Daly|November 26, 2013|DAILY BEAST

The large roll of duct tape was still attached and found next to her head by firefighters.
Autopsies on Hannah Anderson’s Family Bring Police No Closer to a Motive|Christine Pelisek|September 24, 2013|DAILY BEAST
Another smaller lymph duct enters the right subclavian vein.
A Civic Biology|George William Hunter
Above I could see the end of the duct faintly in the light coming up through the open chamber door from the utility room.
Greylorn|John Keith Laumer
Having ligated the duct, he saw it swell below and become empty above the ligature.
An Epitome of the History of Medicine|Roswell Park
The duct that bears his name was discovered during his residence in Leyden or at Amsterdam.
An Epitome of the History of Medicine|Roswell Park
The ancient conception of the artery as an air-duct gave rise to the derivation from Gr.
Chambers's Twentieth Century Dictionary (part 1 of 4: A-D)|Various