dozen

n. twelve items, group of twelve

Dozen is another word for the number twelve. The dozen may be one of the earliest primitive groupings, perhaps because there are approximately a dozen cycles of the moon or months in a cycle of the sun or year. The dozen is convenient because its multiples and divisors are convenient: 12 = 2 × 2 ×  3 = 3 ×  4 = 2 ×  6, 60 = 12 ×  5, 360 = 12 ×  30. The use of twelve as a base number, known as the duodecimal system (also as dozenal), probably originated in Mesopotamia (see also sexagesimal). Twelve dozen (122 = 144, the duodecimal 100) are known as a gross; and twelve gross (123 = 1,728, the duodecimal 1,000) are called a great gross, a term most often used when shipping or buying items in bulk. A great hundred, also known as a small gross, is 120 or ten dozen (a dozen for each finger on both hands). A baker's dozen, also known as a long dozen, is thirteen.
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Noun
1. the cardinal number that is the sum of eleven and one
(synonym) twelve, 12, XII
(hypernym) large integer
(hyponym) boxcars
Adjective
1. denoting a quantity consisting of 12 items or units
(synonym) twelve, 12, xii
(similar) cardinal

n. box, case, container

(pl. )
of Dozen
  

(n.)
An indefinite small number.
  

(n.)
A collection of twelve objects; a tale or set of twelve; with or without of before the substantive which follows.