ductus arteriosus
— Noun
– English
~ a blood vessel in a fetus that bypasses pulmonary circulation by connecting the pulmonary artery directly to the ascending aorta; normally closes at birth
ductus deferens
— Noun
– English
~ a duct that carries spermatozoa from the epididymis to the ejaculatory duct
dud
— Adjective
– English
~ failing to detonate; especially not charged with an active explosive; "he stepped on a dud mine"
dud
— Noun
– English
~ an event that fails badly or is totally ineffectual; "the first experiment was a real turkey"; "the meeting was a dud as far as new business was concerned"
dud
— Noun
– English
~ an explosion that fails to occur
dud
— Noun
– English
~ someone who is unsuccessful