the world > relative properties > number > specific numbers > eleven to ninety-nine > [adjective] > twelve > twelfth (3)
The ordinal numeral corresponding to the cardinal numeral twelve, adj. n.; last of twelve; that… With a modified noun expressed.
Used for the ordinal twelfth, adj. n.; in quot. 1691 Twelve eve = Twelfth-eve, n. Obsolete (exc. after the noun in such expressions as page twelve…
= twelfth, adj. So half-dozenth = sixth, adj. n.