A set of twelve.

plural of dozen

(usually with "the", African-American Vernacular) A verbal game in which two or more people exchange witty insults.

(arithmetic, neologism) Of a number, expressed in dozenal.

(arithmetic, neologism) A value in a number system that uses 12 as its base.

(neologism) The belief that humans should use a base 12, or duodecimal, number system instead of decimal.

plural of dozenal

(idiomatic) Thirteen; a group of thirteen. / (Cockney rhyming slang) A cousin.

(US, idiomatic) So common as to be practically worthless.

Misspelling of baker's dozen.