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- (mathematics) Indicates the exponent (either as a number, or as a letter variable) in a power expression.
- 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.
- (chemistry) Indicates the number of neutrons of an isotope.
- (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.
- Used for symbols that are secondary to the main text, such as ™, ℠, ®.
- Footnotes and annotations. e.g. *, **, †, ‡
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- Used in the abbreviations of ordinal numbers: 1º, 2º, 3º, 4º.
- Used in the abbreviations of some forms of address: ex.ᵐᵒ = excelentíssimo; m.ᵐᵒ = meritíssimo.