Caddis-fly definition

Any of an order (Trichoptera) of small, mothlike insects with a soft body, long antennae and legs, and two pairs of hairy, membranous wings.
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Any insect, of the order Trichoptera, having two pairs of hairy wings; they are found near lakes and streams.
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Other Word Forms

Noun

Singular:
caddis-fly
Plural:
caddis-flies