Lacewing definitions

lās'wĭng'
Any of various neuropteran insects of several families, especially Chrysopidae and Hemerobiidae, having predaceous larvae and, in the adult, two pairs of delicate, many-veined wings and long antennae.
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Any of various families of neuropteran insects with four delicate, gauzy wings: the larvae feed on aphids and other insect pests.
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Any of a number of gauzy-winged insects of certain families within the order Neuroptera.
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Origin of lacewing

From lace +‎ wing.