IV

• IIII, iv, iiii, iiij
• IV. (ordinal number)

One (I) less than five (V)

IV

1. A Roman numeral representing four (4).

IV

1. Used to indicate an ordinal number; the fourth (common as a name suffix)
2. (inorganic chemistry) Specifying an oxidation state of 4
3. (music) major subdominant triad

• IPA^(key): /ˌaɪ ˈviː/

IV (not comparable)

1. (medicine) Abbreviation of intravenous.

   Alternative form: i.v.

IV (plural IVs)

1. (medicine) Initialism of intravenous injection.
2. (cryptography) Initialism of initialization vector.
3. (statistics) Initialism of instrumental variable.
4. Initialism of immigrant visa.

• -vi-, V. I., V.I., VI, Vi, v.i., vi, vi.

IV

1. Abbreviation of Iupiter (“Jupiter”).

IV

1. 4