alderfly
[ awl-der-flahy ]
/ ˈɔl dərˌflaɪ /
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noun, plural al·der·flies.
any of several dark-colored neuropterous insects of the family Sialidae, the larvae of which are aquatic and predacious on other aquatic insects.
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British Dictionary definitions for alderfly
alder fly
noun
any of various neuropterous insects of the widely distributed group Sialoidea, such as Sialis lutaria, that have large broad-based hind wings, produce aquatic larvae, and occur near water
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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