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Definition of Fifty-fifth
1. Adjective. The ordinal number of fifty-five in counting order.
Definition of Fifty-fifth
1. Numeral. (ordinal) The ordinal form of the number fifty-five, describing a person or thing in position number 55 of a sequence. ¹
2. Noun. (fractional) One of fifty-five equal parts of a whole. ¹
¹ Source: wiktionary.com