thallus
/ˈθæl.əs/
"thallus" is a 7-letter English headword indexed on PlainSpell.
The verdict
“thallus” is uncommon English (frequency #89,988 among 3,151 “T” headwords), classed as a noun. The kind of spelling people second-guess.
- #89,988
- frequency rank, English
- 3,151
- “T” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An undifferentiated plant body, such as in algae.
Corpus desk
Index EN-thallus · thallus · English
thallus · rank #89,988 · 0 variants · 0 confusables
- FREQ-RARE #89,988
- LEN-LONG 7 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 3,151
- PHOTO-FINISH Theotokos
Nearest frequency peer: Theotokos (+2 rank slots)
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.
Long-tail ranks near “thallus”
Sparse band: bars invert rank so rarer forms read shorter
- tela
tela
10,020 corpus weight
- Tenzing
Tenzing
10,018 corpus weight
- thallus
thallus
10,013 corpus weight
- Theotokos
Theotokos
10,011 corpus weight
- thoracotomy
thoracotomy
10,010 corpus weight
- Timebomb
Timebomb
10,008 corpus weight
What this shows Long-tail view: where “thallus” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | thallus |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈθæl.əs/ |
| Letters | 7 |
| Frequency rank | #89,988 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “thallus” in English
Rare enough to double-check
thallus is uncommon English at frequency #89,988 among 3,151 “T” headwords, classed as anoun, transcribed /ˈθæl.əs/. Rarity is why readers land here mid-draft. 2 senses are on record.
Zero misspellings are on record for thallus in our index, since its letter pattern doesn't lend itself to common typo substitutions. No close-neighbour confusable shows up for this headword in our dataset, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: From Ancient Greek θαλλός (thallós, “young shoot, twig”), from Proto-Indo-European *dʰelh₁- (“to bloom”). The correct English form is thallus, spelled T-H-A-L-L-U-S.
Definition
- 1An undifferentiated plant body, such as in algae.
- 2Any plant body lacking vascular tissue.
Recorded use
Wiktionary exampleThese source excerpts show how thallus appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
As it flows it takes the forms of sappy leaves or vines, making heaps of pulpy sprays a foot or more in depth, and resembling, as you look down on them, the laciniated, lobed, and imbricated thalluses of some lichens; […]
Etymology
From Ancient Greek θαλλός (thallós, “young shoot, twig”), from Proto-Indo-European *dʰelh₁- (“to bloom”).
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); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "thallus", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 7 letters (nearest by frequency rank).