Illustration of mayfly
: any of an order (Ephemeroptera) of insects with an aquatic nymph and a short-lived, fragile adult lacking mouthparts and having membranous, heavily veined wings and two or three long, threadlike tails
Note: the wings of the mayfly are held vertically above the body when closed.
called also ephemerid
Examples of mayfly in a Sentence
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Keep the rig small; mayfly larvae are rarely longer than an inch.
—
Alex Robinson, Outdoor Life, 13 June 2024
Starting in May and running through September, mayflies emerge all across North America.
—Shaye Baker, Field & Stream, 6 June 2024
Below is a quick guide to mayfly basics, hatch timing and location, and mayfly fishing tips.
—Shaye Baker, Field & Stream, 6 June 2024
During a Mayfly Hatch One of the toughest times to catch walleyes is during a significant mayfly hatch.
—Alex Robinson, Outdoor Life, 13 June 2024
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Alex Robinson, Outdoor Life, 13 June 2024
Starting in May and running through September, mayflies emerge all across North America.
—Shaye Baker, Field & Stream, 6 June 2024
Below is a quick guide to mayfly basics, hatch timing and location, and mayfly fishing tips.
—Shaye Baker, Field & Stream, 6 June 2024
During a Mayfly Hatch One of the toughest times to catch walleyes is during a significant mayfly hatch.
—Alex Robinson, Outdoor Life, 13 June 2024
See all Example Sentences for mayfly
Dictionary Entries Near mayfly
Cite this Entry
“Mayfly.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mayfly. Accessed 22 Dec. 2024.
Copy CitationKids Definition
mayfly
noun
may·fly
-ˌflī 
: any of a group of insects that as adults live only a short time and have fragile wings
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