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shadfly

American  
[shad-flahy] / ˈʃædˌflaɪ /

noun

plural

shadflies

  1. mayfly.

Etymology

Origin of shadfly

An Americanism dating back to 1830–40; so called because they hatch at the time of year when shad are running

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.