What is "numero sign"

n. A sign that serves as an abbreviation of the word number. It is comprised of a capital letter N with a lowercase letter o, the latter typically superscript and sometimes underlined. Examples of numero signs include: No., No, №, and Nº.

The numero sign or numero symbol, № (also represented as Nº, No, No. or no. (US English), or No or no (UK English) plural Nos. or nos. (US English) or Nos or nos UK English ), is a typographic abbreviation of the word number(s) indicating ordinal numeration, especially in names and titles. For example, with the numero sign, the written long-form of the address "Number 22 Acacia Avenue" is shortened to "№ 22 Acacia Avenue", yet both forms are spoken long.

Typographically, the numero sign combines the upper-case Latin letter N with a usually superscript lower-case letter o, sometimes underlined, resembling the masculine ordinal indicator. In Unicode, the character is .

The Oxford English Dictionary derives the numero sign from Latin , the ablative form of ("number", with the ablative denotations of: "by the number, with the number"). In Romance languages, the numero sign is understood as an abbreviation of the word for "number", e.g. Italian , French , and Catalan, Galician, Portuguese and Spanish'' ''.