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thirty numeral

  /ˈθɜːti/ , /ˈθɝti/ , [ˈθɝɾi]
  • The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30.
 treinta

thirties noun

  • A decade starting with the year xx30, most usually the decade from 1930 to 1939.
 años treinta, treintas
  • The decade of one's life from age 30 through age 39.
 treinta y pico, treinta y tantos, treintas, treintañero, treintón
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