º U+00BA,º MASCULINE ORDINAL INDICATOR ←¹ [U+00B9] Latin-1 Supplement » → [U+00BB]

A small lettero, to be placed at thetop of the line, often underlined.

º

1. Used as themasculineordinal indicator in several Romance languages.

   1º,2º,3º

   Coordinate term:ª(feminine ordinal indicator)

2. Used as a generalordinal indicator in other languages.
   • 1966,George J. Minty, “On the Axiomatic Foundations of the Theories of Directed Linear Graphs, Electrical Networks and Network-Programming”, inJournal of Mathematics and Mechanics, volume15, number 3 (in English),→JSTOR, pages506–507:

     Adigraphoid is a structure consisting of: (1º) a graphoid, and (2º) apartitioning of each circuit and cocircuit of the graphoid,each being partitioned into two sets; this partitioning is to satisfy the axiom:[…]

3. (nonstandard)Alternative form of°(“degree”).
   • 2021 July 1, Gregory McNamee, “Does spinach make you strong? Ask Popeye – and science”, inCNN‎^[1] (in English), archived fromthe original on11 June 2025:

     For this reason, the US Centers for Disease Control and Prevention recommends that spinach be cooked at 160º for 15 seconds, which kills potentially fatal bacteria.

• №
• ᵉʳ

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