What does intravenous mean?

Intravenous is the manner of delivery for drugs, blood, saline, or other solutions: a small needle inserted into a vein supports a channel-like device that can be attached to bags or other containers to keep a steady supply entering the blood-stream of a patient.This manner of delivery, if kept open, usually doesn't require re-insertion of the needle and is efficient and less likely to cause infection than other manners of delivering solutions.