-teen(redirected from -teenth)
n combining form
(Mathematics) ten: added to modified forms of the numbers 3 to 9 to form the numbers 13 to 19
[Old English -tēne, -tӯne]
-teenth adj combining form
2. a teenager.
[before 1000; Middle English tene, Old English tēona]
a suffix used to form cardinal numerals from 13 to 19.
[Middle English, Old English -tēne, comb. form of ten]