noun
an arthropod family including: alderflies
• Syn: ↑family Sialidae
• Hypernyms: ↑arthropod family
• Member Holonyms: ↑Megaloptera, ↑suborder Megaloptera
• Member Meronyms: ↑Sialis, ↑genus Sialis
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\\sīˈaləˌdē\ noun pluralUsage: capitalized
: a family of usually large insects (order Megaloptera) including the hellgrammite, alderflies, and related forms and having the hind wings broad at the base with their anal angle folding in plaits
Useful english dictionary. 2012.