venous

(relational) Of or pertaining to veins.
(relational) Having passed through the capillaries and given up oxygen for the tissues and become charged with carbon dioxide.
Possessing veins.
Having numerous veins.

Pronounced as (IPA)

/ˈviː.nəs/

Morphologically vein + -ous, which is a borrowing from Latin vēnōsus (“full of veins, veiny”), from vēna (“a blood vessel, vein”) + -ōsus (“-ous, -ose”, adjectival suffix). Doublet of venose.