IV

Alternative forms

• iv, IIII, iiii
• IV. (name suffix)

Etymology

One (I) less than five (V)

Numeral

IV

1. A Roman numeral representing four (4).

Symbol

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

Adjective

IV (not comparable)

1. (medicine) Initialism of intravenous.

Noun

IV (plural IVs)

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

Anagrams

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

Etymology 1

Etymology 2