THIRTEENTHLY
Etymology
Adverb
thirteenthly (not comparable)
In the thirteenth place; thirteenth in a row.
Source: Wiktionary
THIRTEENTH
Thir"teenth`, a. Etym: [From Thirteen: cf. AS. .]
1. Next in order after the twelfth; the third after the tenth; -- the
ordinal of thirteen; as, the thirteenth day of the month.
2. Constituting or being one of thirteen equal parts into which
anything is divided.
Thir"teenth`, n.
1. The quotient of a unit divided by thirteen; one of thirteen equal
parts into which anything is divided.
2. The next in order after the twelfth.
3. (Mus.)
Definition: The interval comprising an octave and a sixth.
Source: Webster’s Unabridged Dictionary 1913 Edition