/suy"euh lid/ , n.
1. any neuropterous insect of the family Sialidae, comprising the alderflies.
adj.
2. belonging or pertaining to the family Sialidae.
[ Sialidae name of the family, equiv. to Sialid-, s. of Sialis a genus (Gk sialís a kind of bird) + -idae -ID 2 ]