/ twelv; NAmE / number 12
► twelfth / twelfθ; NAmE / ordinal number , noun
HELP NOTE : There are examples of how to use ordinal numbers at the entry for fifth .
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WORD ORIGIN
Old English twelf(e) , from the base of two + a second element (probably expressing the sense left over); of Germanic origin and related to Dutch twaalf and German zwölf . Compare with eleven .