noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A mayfly.
2. 2
   slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days wordnet

Synonyms

All synonyms

mayflymayflyshadfly

Etymology

From day + fly, since the adults typically live only for a day.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.