suffers from venous thrombosis (thrombosis is a type of blood clot)
venous blood (as contrasted with arterial blood)
a venous graft to the left anterior descending artery
"A still life like this one —" he indicated the Claesz, with a slow wave (black-rimmed fingernails, scarred venous network on the back of his hand) — "well, so insistently a trompe roar.
Donna Tartt -- The Goldfinch
Dark red predominated, as if someone had spilled a great deal of venous blood in here.
Stephen King -- Misery
Below all these mines which we have just mentioned, below all these galleries, below this whole immense, subterranean, venous system of progress and utopia, much further on in the earth, much lower than Marat, lower than Babeuf, lower, much lower, and without any connection with the upper levels, there lies the last mine.
Victor Hugo -- Les Miserables
First, the portal vein, which carries all the venous blood leaving the gut and hauls it to the liver, blood that after a meal is rich in fats and other nutrients for the factory to process.