twenty-eighth
[ twen-tee-eytth, -eyth, twuhn- ]
/ ˈtwɛn tiˈeɪtθ, -ˈeɪθ, ˈtwʌn- /
adjective
next after the twenty-seventh; being the ordinal number for 28.
being one of 28 equal parts.
noun
a twenty-eighth part, especially of one (1/28).
the twenty-eighth member of a series.