firefly

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firefly¹

  • /ˈfaɪ.əˌflaɪ/ UK
  • /ˈfaɪ.ɚˌflaɪ/ US

Where it comes from

Endocentric compound of fire + fly, because the insects glow; whence also lightning bug. Compare glow fly, glowworm, and lanternfly.

Compare typologically Ancient Greek λαμπυρίς (lampurís, “glowworm”) (<+ πῦρ (pûr)).

noun fireflies · fire-fly

  1. Florida, Northern US, US, Western Any beetle of the family Lampyridae, which exhibit bioluminescence during twilight. 2000, Exploring Life Science, 2: Bats—Cave Life, Marshall Cavendish, page 96, Fireflies are the best-known insects that produce light. […] Many fireflies use their light to communicate, particularly at mating time when males and females have to get together.

    Similar: lightning beetle, lightning bug, glow fly

Firefly²

proper noun

  1. A locality in the MidCoast council area, eastern New South Wales, Australia.

Thesaurus

Closest in meaning: fire beetle, lightning bug, pyrophorus noctiluca, luciferin, luciferase, bioluminescence, fire-fly, lampyrid, lampyrine, lanternfly, firebeetle, glow fly, common glowworm, common glow-worm, glowworm, lantern fly

Translations

Every language

noun Lampyridae

Españolluciérnaga
한국어개똥벌레 gaettongbeolle, 반딧불 banditbul, 반딧불이 banditburi
日本語蛍 hotaru, ホタル hotaru
中文螢火蟲 /萤火虫 yínghuǒchóng
हिन्दीज्योतिरिंगण jyotiriṅgaṇ, खद्योत khadyot, जुगनू jugnū
Kiswahilikimetameta
Portuguêsvaga-lume, pirilampo, vagalume
Françaisluciole, mouche à feu, moiselle, ver luisant
DeutschGlühwürmchen, Leuchtkäfer, Johanniswürmchen
Italianolucciola
Ελληνικάπυγολαμπίδα pygolampída, κωλοφωτιά kolofotiá
Românălicurici
Русскийсветля́к svetlják, светлячо́к svetljačók
Tiếng Việtđom đóm, huỳnh
العربيةيَرَاعَة yarāʕa, حُبَاحِب ḥubāḥib
עבריתגַּחְלִילִית gaẖlilít

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MLA

"firefly." Wiktionary, via Micwyn, micwyn.com/word/firefly. Accessed 6 Nov. 2026.

APA

firefly. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/firefly

Chicago

"firefly." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/firefly.

BibTeX
@misc{firefly_2026,
  title = {firefly},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/firefly},
  urldate = {2026-11-06}
}