glowworm

Name: glowworm, English Word Data
Creator: Wiktionary
License: https://creativecommons.org/licenses/by-sa/4.0/

noun

By PlainSpell · According to Wiktionary data (CC BY-SA) · analyzed May 6, 2026

The verdict

“glowworm” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English: 8
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The larva or wingless grub-like female of a beetle from the families Phengodidae or Lampyridae that gives out a green light from its abdomen.

Key facts for glowworm
Property	Value
Headword	glowworm
Language	English
Part of speech	Noun
Letters	8
Misspellings tracked	0
Confusable pairs	0
Source	Wiktionary (kaikki.org)

Where “glowworm” sits in English frequency

glowworm falls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

glowworm is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.

The misspelling generator found no plausible variants for glowworm, since its letter sequence doesn't invite the usual edit-distance slips. It is not paired with a close-neighbour confusable in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From Middle English glouworm; equivalent to glow + worm. Compare cognate German Glühwurm; compare also firefly, lightning bug, and lanternfly. The correct English form is glowworm, spelled G-L-O-W-W-O-R-M.

Definition

1
The larva or wingless grub-like female of a beetle from the families Phengodidae or Lampyridae that gives out a green light from its abdomen.
2
A carnivorous gnat larva in the keroplatid genus Arachnocampa that spins threads to capture insects attracted by its glow.

Etymology

From Middle English glouworm; equivalent to glow + worm. Compare cognate German Glühwurm; compare also firefly, lightning bug, and lanternfly.

This word in other languages

luciérnaga(Español)ver luisant(Français)Glühwürmchen(Deutsch)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "glowworm"?

"glowworm" is spelled G-L-O-W-W-O-R-M.

What does "glowworm" mean?

As a noun, "glowworm" means: The larva or wingless grub-like female of a beetle from the families Phengodidae or Lampyridae that gives out a green light from its abdomen.

What is the origin of the word "glowworm"?

From Middle English glouworm; equivalent to glow + worm. Compare cognate German Glühwurm; compare also firefly, lightning bug, and lanternfly. See the full etymology section above for more details.

Is PlainSpell free to use?

Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “glowworm”

The practical upshot for anyone who landed here from a spell-check.

The one correct English spelling is G-L-O-W-W-O-R-M - every other letter order is a misspelling in standard orthography.
Browse more English words and confusable pairs in the same reference. English words

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.