A small bioluminescent insect, typically a beetle, that produces light in its abdomen.
Compound word from 'glow' (Old English glōwan) and 'fly' (Old English fleoge). Used as an alternative or poetic term for fireflies and similar light-producing insects in various English-speaking regions.
Different regions have wildly different names for the same insect—firefly in the US, glowworm in Britain, and in some places glowfly—yet they're mostly talking about beetles in the family Lampyridae.
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