78

noun, plural 78s, 78's.

an early type of shellac-based phonograph record that played at 78 revolutions per minute.

Origin:
1950–55

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet

78
adjective
1.	being eight more than seventy [syn: seventy-eight]
noun
1.	the cardinal number that is the sum of seventy and eight [syn: seventy-eight]
2.	a shellac based phonograph record that played at 78 revolutions per minute [syn: seventy-eight]

WordNet® 3.0, © 2006 by Princeton University.
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