A channel or tube for conveying something.
"no bile duct dilation" means the diameter if the bile duct is normal.
In the word "product" the letters "~duct" are not a suffix and have no independent meaning.
lead
I think you mean Bile duct obstruction, you can call it Biliary obstruction
a smoke-duct in a chimney
cystic duct and the hepatic duct
it's really the entrance to inside the egg or ovum
common bile duct
common bile ductThe common bile duct.
Stenson's duct
Actually, "duct" is a root word meaning to lead or direct.
In pigs, the duct from the gallbladder is called the cystic duct, which merges with the common hepatic duct to form the common bile duct. This common bile duct then carries bile from the liver and gallbladder to the duodenum for digestion.