(at′ləs) noun
1. A volume of maps usually bound together.
2. Hence, any bound collection of plates or engravings showing systematically the development of a subject, or any work producing such effect by tabular arrangement.
3. A large size of paper, 26 by 33 (34) inches.
4. Anat. The first cervical vertebra: so called after Atlas, who bore the world on his shoulders.
5. Archit. Any of the Atlantes. [def. 1 <ATLAS; because some early collections of maps contained a picture of Atlas supporting the heavens]

(at′ləs)
1. In Greek mythology, a Titan supporting the pillars of heaven on his shoulders.
2. Anyone bearing a great burden.
3. An intercontinental ballistic missile of the U.S. Air Force. [<L <Gk. Atlas <tlaein bear]