I. | ̷ ̷ ̷ ̷| ̷ ̷ adjective
1. : being number 55 in a countable series
the fifty-fifth day
— see number table
2. : being one of 55 equal parts into which something is divisible
a fifty-fifth share of the money
II. noun
1. : number 55 in a countable series
2. : the quotient of a unit divided by 55 : one of 55 equal parts of something
one fifty-fifth of the total