Centro is an Italian equivalent of 'the middle one', in the sense of 'the one in the center'. It's a masculine gender noun that takes as its definite article 'il' ['the'], and as its indefinite article 'uno' ['a, one']. It's pronounced 'CEHN-troh'.
Mezzano is another Italian equivalent of 'the middle one', in the sense of 'the middle sized one'. It's a masculine adjective that's used as a noun. It's pronounced 'Mehts-TSAH-noh'.
"Little one" in English is piccolino in Italian.
Una in Italian means "a," "an," or "one" in English.
Mono in Italian means "one" in English."
"Crazy one" in English is un pazzo in Italian.
"One time" in English is una volta in Italian.
"One to 30" in English is da uno a trenta in Italian.
Un before a consonant in Italian means "a" or "one" in English.
"Dear one" in English is cara for a female and caro for a male in Italian.
numero uno
Il fortunato in Italian means "the lucky one" in English.
Una ragazza in Italian means "a (one) girl" in English.
Un attimo in Italian means "one moment" in English.