See also:

Portuguese

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Portuguese numbers (edit)
40
 ←  3 4 5  → 
    Cardinal: quatro
    Ordinal: quarto
    Ordinal abbreviation: 4.º
    Multiplier: quádruplo
    Fractional: quarto
    Group: quarteto

Alternative forms

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Etymology

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Abbreviation of quarto.

Adjective

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4.º (feminine 4.ª, masculine plural 4.os, feminine plural 4.as, not comparable)

  1. (ordinal number) 4th

Spanish

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Spanish numbers (edit)
40
 ←  3 4 5  → 
    Cardinal: cuatro
    Ordinal: cuarto
    Ordinal abbreviation: 4.º
    Multiplier: cuádruple
    Fractional: cuarto

Adjective

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4.º (feminine 4.ª, masculine plural 4.ºs, feminine plural 4.ªs)

  1. 4th; abbreviation of cuarto