Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A mayfly, especially one of the family Ephemeridae.
from The Century Dictionary.
- noun In entomology, an insect of the family Ephemeridæ.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun zoology Any member of the Ephemeridae.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun short-lived insect
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[From New Latin Ephēmeridae, former order name, from Greek ephēmeron, mayfly; see ephemeron.]
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Examples
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Those who play a waiting game have matters more in their own hands, time gives them double chances; whereas if success does not come at once to the ephemerid he misses it altogether.
The Note-Books of Samuel Butler Samuel Butler 1868
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In fact, it's quite normal for Dutch scientific terminology to occur in pairs composed of a "difficult" and a homier variant: ephemerid can be translated as efemeride or as eendagsvlieg
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