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mayfly

mayfly [ máy flī ] (plural mayflies)


noun 
Definition:
 
1. short-lived insect: an insect that lives as an adult for only a few days, typically having two or four pairs of flimsy wings and two or three long slender tail appendages. The female lays her eggs in fresh water, where the larvae develop without a chrysalis stage. Order Ephemeroptera.

2. fishing fly: a fishing fly that looks like a mayfly

[Mid-17th century. < the mistaken belief that they appear only in May]
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