noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A member of any one of the 66 species of the family Sialidae of megalopteran insects, each specimen of which has a body length not exceeding one inch and possesses long filamentous antennae and four large dark wings.
2. 2
   dark-colored insect having predaceous aquatic larvae wordnet
3. 3
   An artificial fly with brown mottled wings, body of peacock harl, and black legs.

Synonyms

All synonyms

alder flyorl flyorl flysialis lutaria

Etymology

From alder + fly.

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