Meaning of “intravenous” in the English Dictionary

"intravenous" in British English

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uk /ˌɪn.trəˈviː.nəs/ us /ˌɪn.trəˈviː.nəs/ abbreviation IV

into or connected to a vein:

intravenous feeding/fluids
an intravenous drip/injection.
Intravenous drug users are at particular risk of contracting the disease.

(Definition of “intravenous” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"intravenous" in American English

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intravenousadjective [ not gradable ]

us /ˌɪn·trəˈvi·nəs/ abbreviation IV

put directly into a vein (= one of the tubes in the body that carry blood to the heart):

an intravenous drug
adverb [ not gradable ] us /ˌɪn·trəˈvi·nəs·li/

The antibiotic was given in a fluid intravenously.

(Definition of “intravenous” from the Cambridge Academic Content Dictionary © Cambridge University Press)