78s

78

[sev-uhn-tee-eyt]
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. 2014.
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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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