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firefly
(-flī′)
noun pl. fireflies
any of a family (Lampyridae) of winged beetles, active at night, whose abdomens usually glow with a luminescent light
See firefly in American Heritage Dictionary 4
noun
Any of various nocturnal beetles of the family Lampyridae, characteristically having luminescent chemicals in the posterior tip of the abdomen that produce a flashing light. Also called lightning bug. See Regional Note at lightning bug.
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