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EP (1)
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Ep.
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epact
epanalepsis
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ephemera (2)

e·phem·er·a [ i fémmərə ] (plural e·phem·er·ae [ i fémmə r ] or e·phem·er·as)


noun 
Definition:
 
1. something short-lived: something that is transitory and without lasting significance

2. insects 
Same as  mayfly (sense 1)


[14th century. < medieval Latin< late Latin ephemerus "lasting only a day" < Greek ephēmeros< hēmera "day"]
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