Appendix:Superscript

Translingual

Typographical usage

[superscript]

1. (mathematics) Indicates the exponent (either as a number, or as a letter variable) in a power expression.

   3²=9

   2ⁿ=16 for n=4

   • 2010, "The Late Philip J. Fry", season 6, episode 7 of Futurama

     [Fry, Bender and Professor Farnsworth are inside a time machine, travelling through the far future. Eventually, they watch the end of the universe.]

     Professor Farnsworth: The last proton should be decaying about now.

     [written on the time machine display]: YEAR 1×10⁴⁰ AD

     Fry: Bye, last proton.

2. (chemistry) Indicates the number of neutrons of an isotope.

   ³He

3. (chemistry) The plus (+) or minus (−) sign indicate the charge of ions and subatomic particles. Usually, they are accompanied by a number, except when the number would be 1.

   Na⁺Cl⁻

4. Used for symbols that are secondary to the main text, such as ™, ℠, ^®.
5. Footnotes and annotations. e.g. *, **, †, ‡

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English

Typographical usage

[superscript]

1. Optionally used in abbreviations of ordinal numbers: 1ˢᵗ, 2ⁿᵈ, 3ʳᵈ, 4ᵗʰ = 1st, 2nd, 3rd, 4th.

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Portuguese

Typographical usage

[superscript]

1. Used in the abbreviations of ordinal numbers: 1º, 2º, 3º, 4º.
2. Used in the abbreviations of some forms of address: ex.ᵐᵒ = excelentíssimo; m.ᵐᵒ = meritíssimo.

Spanish

Typographical usage

[superscript]

1. Used in the abbreviations of ordinal numbers: 1º, 2º, 3º, 4º.