LBM

noun

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

The verdict

“LBM” is an uncommon English word, ranked #91,730 in English word frequency and used as a noun.

#91,730
frequency rank, English
3
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of little brown mushroom: any of a large number of small, dull-coloured agaric species that are difficult to tell apart.

Key facts for LBM
PropertyValue
HeadwordLBM
LanguageEnglish
Part of speechNoun
Letters3
Frequency rank#91,730
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “LBM” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). LBM lands here:

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for LBM is 3 letters long, classified as a noun. Corpus data places it at rank #91,730 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.

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.

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.

Using “LBM”

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

  • The one correct English spelling is L-B-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.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list