Sev"en*teenth` (?), a. [From Seventeen: cf. AS. seofonteo&edh;a, seofonteoge&edh;a.] 1. Next in order after the sixteenth; coming after sixteen others.
In . . . the seventeenth day of the month . . . were all the fountains of the great deep broken up.
Gen. vii. 11.
2. Constituting or being one of seventeen equal parts into which anything is divided.
© Webster 1913.
Sev"en*teenth` (?), n. 1. The next in order after the sixteenth; one coming after sixteen others.
2. The quotient of a unit divided by seventeen; one of seventeen equal parts or divisions of one whole.
3. Mus. An interval of two octaves and a third.
© Webster 1913. | 
