fifteenth, a. [OE. fiftenthe; cf. fiftethe, AS. fīfte. See Fifteen.].
Next in order after the fourteenth; -- the ordinal of fifteen. [1913 Webster]
Consisting of one of fifteen equal parts or divisions of a thing. [1913 Webster]
fifteenth, n.
One of fifteen equal parts or divisions; the quotient of a unit divided by fifteen. [1913 Webster]
A species of tax upon personal property formerly laid on towns, boroughs, etc., in England, being one fifteenth part of what the personal property in each town, etc., had been valued at. Burrill. [1913 Webster]
A stop in an organ tuned two octaves above the diaposon. [1913 Webster]