Thir"teen` (?), a. [OE. threttene, AS. reot�xc7;ne, reotyne. See Three, and Ten, and cf. Thirty.]
One more than twelve; ten and three; as, thirteen ounces or pounds.
© Webster 1913.
Thir"teen`, n.
1.
The number greater by one than twelve; the sum of ten and three; thirteen units or objects.
2.
A symbol representing thirteen units, as 13 or xiii.
© Webster 1913.