WordReference Random House Unabridged Dictionary of American English © 2026
si•a•lid
(sī′ə lid),USA pronunciation n.
adj.
- Insectsany neuropterous insect of the family Sialidae, comprising the alderflies.
adj.
- Insectsbelonging or pertaining to the family Sialidae.
- Neo-Latin Sialidae name of the family, equivalent. to Sialid-, stem of Sialis a genus (Greek sialís a kind of bird) + -idae -id2