Webster's Revised Unabridged Dictionary · 1913

Hundredth

Hundredth , adjective

1.
Coming last of a hundred successive individuals or units.
2.
Forming one of a hundred equal parts into which anything is divided; the tenth of a tenth.

Hundredth , noun

One of a hundred equal parts into which one whole is, or may be, divided; the quotient of a unit divided by a hundred.