IV

I1V4
/ˌaɪ ˈviː/

A form of intravenous — Inside the veins.

Similar
four4tetradquaternquaternionquaternaryquaternityquartet
Very commonScrabble 5
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Meanings

adjectiveIV (not comparable)
  1. abbreviationnot comparablemedicineAbbreviation of intravenous.
nounIV (countable and uncountable, plural IVs)

plural IVs

  1. abbreviationcountableinitialismuncountablemedicineInitialism of intravenous injection.
  2. abbreviationcountableinitialismuncountablecomputingInitialism of initialization vector.
  3. abbreviationcountableinitialismuncountablemathematicsInitialism of instrumental variable.
  4. abbreviationcountableinitialismuncountableInitialism of immigrant visa.
  5. abbreviationcountableinitialismuncountablechemistryInitialism of iodine value

Synonyms & antonyms

nounthe cardinal number that is the sum of three and one

Similar
four4tetradquaternquaternionquaternaryquaternityquartetquadrupletfoursomeLittle Joe
Broader
digitfigure

nounadministration of nutrients through a vein

Similar
intravenous feeding
Broader
feedingalimentation

adjectivebeing one more than three

Similar
four4cardinal
Also see
fourfoursomeiodine valuelittle joequadrupletquartetquaternquaternaryquaternionquaternitytetrad

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry
APA

IV. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/IV

MLA

“IV.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/IV. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “IV,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/IV.

Source: IV on Wiktionary, CC BY-SA 4.0.