MFB
"mfb" is a 3-letter English headword indexed on PlainSpell.
The verdict
“MFB” is uncommon English (frequency #87,553 among 4,057 “M” headwords), classed as a noun. The kind of spelling people second-guess.
- #87,553
- frequency rank, English
- 4,057
- “M” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of medial forebrain bundle.
Corpus desk
Index EN-mfb · MFB · English
MFB · rank #87,553 · 0 variants · 0 confusables
- FREQ-RARE #87,553
- LEN-MID 3 letters
- VOW-0 0 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,057
- PHOTO-FINISH Menken
Nearest frequency peer: Menken (-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 “MFB”
Sparse band: bars invert rank so rarer forms read shorter
- Megiddo
Megiddo
12,454 corpus weight
- mehndi
mehndi
12,453 corpus weight
- melodically
melodically
12,451 corpus weight
- Menken
Menken
12,450 corpus weight
- MFB
MFB
12,448 corpus weight
- micromanage…
micromanagement
12,444 corpus weight
What this shows Long-tail view: where “MFB” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | MFB |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #87,553 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “MFB” sits in English frequency
Rare enough to double-check
MFB is uncommon English at frequency #87,553 among 4,057 “M” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Initialism of medial forebrain bundle.".
No misspelling variants are generated for MFB in our index, typically a sign the spelling maps closely to how the word sounds. Our confusable-pair dataset has no match for it, since nothing in our dataset looks or sounds close enough to cause mix-ups.
This entry carries no recorded etymology, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is MFB, spelled M-F-B.
Definition
- 1Initialism of medial forebrain bundle.
Recorded use
Wiktionary exampleThese source excerpts show how MFB appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Using Diffusion Tensor Imaging Fiber Tracking (DTI FT) the authors describe potential converging ascending and descending MFB and anterior thalamic radiation (ATR) that may mediate major brain reward-seeking and punishment functions. Authors highlight novel connectivity, such as supero-lateral-branch MFB and ATR convergence, caudally as well as rostrally,…
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 "MFB", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).