[fif-tee-fawr, -fohr] /ˈfɪf tiˈfɔr, -ˈfoʊr/
a cardinal number, 50 plus 4.
a symbol for this number, as 54 or LIV.
a set of this many persons or things.
amounting to 54 in number.
[fif-tee-fahyv] /ˈfɪf tiˈfaɪv/ noun 1. a cardinal number, 50 plus 5. 2. a symbol for this number, as 55 or LV. 3. a set of this many persons or things. adjective 4. amounting to 55 in number.
[fif-tee-furst] /ˈfɪf tiˈfɜrst/ adjective 1. next after the fiftieth; being the ordinal number for 51. 2. being one of 51 equal parts. noun 3. a fifty-first part, especially of one (1/51). 4. the fifty-first member of a series.
[fi-lair-ee-id] /fɪˈlɛər i ɪd/ adjective 1. of or relating to . noun 2. a .
[fahy-leyt] /ˈfaɪ leɪt/ adjective, Zoology. 1. .