| twelfth | (adjective) coming next after the eleventh and just before the thirteenth in position | Synonyms: 12th |
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| (noun) one part in twelve equal parts | Synonyms: duodecimal, one-twelfth, twelfth part |
| (noun) position 12 in a countable series of things | - |
| twelve | (adjective) denoting a quantity consisting of 12 items or units | Synonyms: 12, dozen, xii |
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| (noun) the cardinal number that is the sum of eleven and one | Synonyms: 12, dozen, XII |
| twelvemonth | (noun) a period of time containing 365 (or 366) days | Synonyms: year, yr |
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