What does intravenously mean?
Intravenously means by or into a vein, usually describing the administration of a liquid substance such as medicine, fluids, or nutrients directly into the bloodstream. The term is especially common in clinical and pharmaceutical contexts, where the route of administration matters because it can affect how quickly a substance is absorbed and how strongly it acts. “Administered intravenously” and “given intravenously” are typical medical formulations, while the abbreviation “IV” is also widely used. Although the word belongs to technical medical vocabulary, it is familiar to many people through hospitals, emergency treatment, and discussion of injections and infusions. Its form reflects its anatomical meaning: it identifies an action performed within or into the veins rather than through the digestive system, skin, or muscles.
adverbBy or into a vein, especially by injection into a vein.
- By or into a vein, especially by injection into a vein.
"The medication was administered intravenously to ensure rapid absorption."
"Fluids were given intravenously when the patient could not drink."
"The drug is delivered intravenously through a catheter in the arm."
The word points inward: Latin intra means “within,” while venous refers to the body's veins.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of intravenously
The word is formed from the Latin prefix intra-, meaning “within,” and the adjective intravenous, which combines this prefix with venous, from Latin venosus, meaning “of or relating to veins.” The underlying Latin noun vena means “vein.” The adjective entered English in the 19th century in medical usage, and the adverb “intravenously” developed from it to describe an action or administration carried out by this route.
How intravenously is actually used
A formal, technical term used primarily in medicine, nursing, pharmacology, and veterinary contexts. It is more precise than the informal phrase “through an IV” when describing a route of administration.
Easily confused with intravenously
“Intravenous” is an adjective describing something involving or entering a vein, while “intravenously” is the adverb explaining how an action is performed.