Definition of silverfish
1
: any of various silvery fishes (such as a tarpon or silverside)
2
: any of various small wingless insects (order Thysanura)
especially
: one (Lepisma saccharina) found in houses and sometimes injurious especially to sized papers or starched clothes
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Merriam-Webster unabridged
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Time Traveler for silverfish
The first known use of silverfish was in 1703
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