III

• iii
• IIJ, iij, IIV, iiv (nonstandard)
• III. (ordinal number)

III

1. Roman numeral representing three (3).
2. Third, in the context of denoting the third person in a family or an office with the same name.
3. (inorganic chemistry) Specifying an oxidation state of 3
4. (spectroscopy) Describing an atom that has lost two electrons
5. (music) major mediant triad