Usage Note
Tercero apocopates to tercer before a masculine singular noun (el tercer piso = the third floor), just like primero becomes primer. The feminine form tercera never apocopates. In fractions, un tercio means 'one third' (not un tercero). The phrase a la tercera va la vencida means 'third time lucky'.
Examples
"Vivo en el tercer piso."
Natural Translation
I live on the third floor.
Related Words
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