veno-, ven-, veni-, vene-, -venous, -venously
(Latin: veins, vessels)
2. An abnormal connection or passageway between an artery and a vein.
2. Existing within or entering through a vein or veins.
Intravenous comes from intra-, "within" or "via", and venous, "of the veins". Often in hospitals patients will be given water or nutrients from intravenous drips from plastic bags of liquid connected to a tube going into a person's arm.
It's a way to get needed nutrition and fluid into a person's body without waiting for the digestive system to process it.
2. A special x-ray of the veins that is performed by first injecting a radiopaque contrast that shows up on x-ray in the vein in question and then taking a conventional x-ray.
Used to demonstrate a blockage of a vein. Commonly used in the lower extremities to diagnose deep venous thrombosis.