[mey-flahy] 
| 1. | Also called shadfly. any insect of the order Ephemeroptera, having delicate, membranous wings with the front pair much larger than the rear and having an aquatic larval stage and a terrestrial adult stage usually lasting less than two days. |
| 2. | Also, May fly. Angling. an artificial fly made to resemble this insect. |
