- any neuropterous insect of the family Sialidae, comprising the alderflies.
- belonging or pertaining to the family Sialidae.
Origin of sialid
< New Latin Sialidae name of the family, equivalent to Sialid-, stem of Sialis a genus (Greek sialís a kind of bird) + -idae -id2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018