ephemeropteran

e·phem·er·op·ter·an

[ih-fem-uh-rop-ter-uhn]
adjective
1.
belonging or pertaining to the insect order Ephemeroptera, comprising the mayflies.
noun

Origin:
< Neo-Latin Ephemeropter(a) (equivalent to Greek ephḗmer(on) ephemeron + -o- -o- + -ptera, neuter plural of -pteros -pterous) + -an

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Collins
World English Dictionary
ephemeropteran (iːˌfɛməˈrɒptərən) [Click for IPA pronunciation guide]
 
n
1.  another word for ephemerid
 
adj
2.  of or relating to the Ephemeroptera

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Ephemeropteran has a plethora of syllables.
So is sesquipedalianism. Does it mean:
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
given to using long words.
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