Twelfth

Twelfth can mean:

• The Twelfth Amendment to the United States Constitution.
• The Twelfth, a Protestant celebration originating in Ireland.

In mathematics:

• 12th, an ordinal number; as in the item in an order twelve places from the beginning, following the eleventh and preceding the thirteenth.
• 1/12, a vulgar fraction, one part of a unit divided equally into twelve parts.