fifty-fifth

[ fif-tee-fifth or, often, -fith ]
/ ˈfɪf tiˈfɪfθ or, often, -ˈfɪθ /

adjective

next after the fifty-fourth; being the ordinal number for 55.
being one of 55 equal parts.

noun

a fifty-fifth part, especially of one (1/55).
the fifty-fifth member of a series.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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