fireflynoun [ C ]uk /ˈfaɪə.flaɪ/ us /ˈfaɪr.flaɪ/
- Fireflies and glowworms make light to protect themselves.
- Glowworms make light to scare other animals, and some fireflies make light to show they aren’t good to eat.
(Definition of “firefly” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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