glowworm

noun

"glowworm" is a 8-letter English headword indexed on PlainSpell.

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 September 3, 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.

Corpus desk

Index EN-glowworm · glowworm · English

glowworm · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 8 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "G" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for glowworm
PropertyValue
Headwordglowworm
LanguageEnglish
Part of speechNoun
Letters8
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “glowworm” in English

glowwormranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

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. 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. 2
    A carnivorous gnat larva in the keroplatid genus Arachnocampa that spins threads to capture insects attracted by its glow.

Recorded use

Wiktionary examples

These source excerpts show how glowworm appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. The glowworm shows the matin to be near And ’gins to pale his uneffectual fire. Adieu, adieu, adieu! Remember me.
  2. 1604, William Alexander, The Alexandraean Tragedie, Act V, Scene 2, in The Monarchicke Tragedies, London: Ed. Blount, 1607, Some things afarre doe like the Glow-worme shine, That lookt to neere haue of that light no signe.

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

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.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list