intravenous

Intravenous is an adjective describing something introduced into, or occurring within, a vein. It is most commonly used in medicine to refer to medicines, fluids, injections, and therapies delivered directly into the bloodstream. This route can act quickly and allows medical professionals to administer fluids or drugs efficiently, especially in emergency, surgical, and hospital settings. The phrase “intravenous drug use” means injecting substances directly into veins rather than taking them by another route. In everyday conversation, medical professionals and patients often shorten the word to “IV,” using expressions such as “IV drip,” “IV fluids,” and “IV antibiotics.” The related adverb “intravenously” is used when describing the manner or route of administration.

Introduced directly into or occurring within a vein. Used especially of medicines, fluids, and medical procedures.

Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.

Where does intravenous come from?

“Intravenous” was formed in the 19th century from the Latin combining form intra-, meaning “within,” and a medical formation associated with vein or venous. Its meaning follows the combined elements literally: “within a vein.” The modern sense of direct administration into a vein developed alongside the medical terminology of the period. The related word “venous” comes from Latin venosus, meaning “pertaining to veins,” while “venule” and “venation” also reflect the Latin root associated with veins and blood vessels.

Related word forms

How intravenous is actually used

This is primarily a medical term. In medicine, it is often shortened informally to “IV,” as in “IV fluids” or “an IV drip.”

What's another word for intravenous?

Words and phrases paired with intravenous

Rhymes with intravenous