Seventeenth

Definition:

(a.) Next in order after the sixteenth; coming after sixteen others.
(a.) Constituting or being one of seventeen equal parts into which anything is divided.
(n.) The next in order after the sixteenth; one coming after sixteen others.
(n.) The quotient of a unit divided by seventeen; one of seventeen equal parts or divisions of one whole.
(n.) An interval of two octaves and a third.

Compare seventeenth with other words:

seventeenth vs. third