LBM

noun

By · According to Wiktionary data (CC BY-SA) ·

"lbm" is a 3-letter English headword indexed on PlainSpell.

The verdict

“LBM” is uncommon English (frequency #91,730 among 2,297 “L” headwords), classed as a noun. The kind of spelling people second-guess.

#91,730
frequency rank, English
2,297
“L” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of little brown mushroom: any of a large number of small, dull-coloured agaric species that are difficult to tell apart.

Corpus desk

Index EN-lbm · LBM · English

LBM · rank #91,730 · 0 variants · 0 confusables

  • FREQ-RARE #91,730
  • LEN-MID 3 letters
  • VOW-0 0 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 2,297
  • PHOTO-FINISH LBR

Nearest frequency peer: LBR (+1 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 “LBM”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “LBM” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for LBM
PropertyValue
HeadwordLBM
LanguageEnglish
Part of speechNoun
Letters3
Frequency rank#91,730
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “LBM” in English

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).LBMfalls in this rarity band:

#1#100#1K#10K#100K
← used constantlyrarely used →

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “LBR” (#91,731), “Leeroy” (#91,733), “laserjet” (#91,726). Among 2,297 “L” headwords, “LBM” is #91,730. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

LBM is uncommon English at frequency #91,730 among 2,297 “L” headwords, classed as anoun. Rarity is why readers land here mid-draft. 4 senses are on record.

LBM has no tracked misspelling variants, suggesting the orthography follows predictable English patterns. We don't track a confusable pairing for this entry, which tends to mean the word is visually distinctive enough to stand on its own.

No explicit etymology string is stored for this entry, so its spelling pattern is best understood through pronunciation rather than a traceable origin. The correct English form is LBM, spelled L-B-M.

Definition

  1. 1
    Initialism of little brown mushroom: any of a large number of small, dull-coloured agaric species that are difficult to tell apart.
  2. 2
    Initialism of long bone metastases.
  3. 3
    Initialism of lattice Boltzmann method.
  4. 4
    Initialism of loose bowel movement: diarrhea.

Recorded use

Wiktionary examples

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

  1. He reached in and pulled out about a dozen mushrooms, shriveled and dried beyond recognition, that could have been Conocybes, Inocybes, Coprini, Psathyrellae, or any of a dozen other kinds of LBMs, mostly inedible, some mildly to seriously toxic, and one, a Galerina, deadly poisonous.
  2. All LBMs should be avoided as edibles.

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

How do you spell "LBM"?
"LBM" is spelled L-B-M.
What does "LBM" mean?
As a noun, "LBM" means: Initialism of little brown mushroom: any of a large number of small, dull-coloured agaric species that are difficult to tell apart.
What language does "LBM" come from?
"LBM" is a English word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "LBM", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 3 letters (nearest by frequency rank).

LBR#91,731kys#91,712kie#91,699jel#91,659

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

Source: FrequencyWords open word-frequency list