Definition:Baker's Dozen

Definition

A baker's dozen is another name for a set whose cardinality is $13$.

Also see

• $13$ (Thirteen)

Linguistic Note

The term baker's dozen arises from the medieval tradition in which a baker would occasionally slip an extra loaf of bread into a consignment of a dozen so as to make sure the batch was not underweight.

Hence it is used in general to mean $12$ plus an extra one.