atlas

2. (Anat.) The first vertebra of the neck, articulating immediately with the skull, thus sustaining the globe of
the head, whence the name.
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3. A collection of maps in a volume;

Note: supposed to be so called from a picture of Atlas supporting the world, prefixed to some collections.
This name is said to have been first used by Mercator,
the celebrated geographer, in the 16th century.
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4. A volume of plates illustrating any subject. [1913 Webster]

5. A work in which subjects are exhibited in a tabular from or arrangement; as, an historical atlas.
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6. A large, square folio, resembling a volume of maps; -- called also {atlas folio}.
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7. A drawing paper of large size. See under Paper, n. [1913 Webster]

Atlas powder, see Atlas powder in the vocabulary; a blasting compound containing nitroglycerin.
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Atlas At"las, n. smooth. A rich kind of satin manufactured in India. --Brande & C.
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Atlas powder At"las pow"der A blasting powder or dynamite composed of nitroglycerin, wood
fiber, sodium nitrate, and magnesium carbonate.
[Webster 1913 Suppl.] ||

Source: The Collaborative International Dictionary of English