lactobacillus

noun

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

"lactobacillus" is a 13-letter English headword indexed on PlainSpell.

The verdict

“lactobacillus” is uncommon English (frequency #60,921 among 2,297 “L” headwords), classed as a noun. The kind of spelling people second-guess.

#60,921
frequency rank, English
2,297
“L” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Any of many rod-shaped, nonmotile, aerobic bacteria, of the genus Lactobacillus, that ferment sugars to form lactic acid

Corpus desk

Index EN-lactobacillus · lactobacillus · English

lactobacillus · rank #60,921 · 0 variants · 0 confusables

  • FREQ-RARE #60,921
  • LEN-MEGA 13 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 2,297
  • PHOTO-FINISH Kumasi

Nearest frequency peer: Kumasi (-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 “lactobacillus”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for lactobacillus
PropertyValue
Headwordlactobacillus
LanguageEnglish
Part of speechNoun
Letters13
Frequency rank#60,921
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “lactobacillus” in English

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).lactobacillusfalls in this rarity band:

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

Scale is logarithmic (each tick is 10× rarer). Rare peers in the same band: “Kumasi” (#60,919), “Kraut” (#60,917), “Krasnodar” (#60,916). Among 2,297 “L” headwords, “lactobacillus” is #60,921. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

lactobacillus is uncommon English at frequency #60,921 among 2,297 “L” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Any of many rod-shaped, nonmotile, aerobic bacteria, of the genus Lactobacillus, that ferment sugars to form lactic acid".

The misspelling generator found no plausible variants for lactobacillus, since its letter sequence doesn't invite the usual edit-distance slips. This headword has no recorded confusable partner, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From the genus name. lacto- + bacillus The correct English form is lactobacillus, spelled L-A-C-T-O-B-A-C-I-L-L-U-S.

Definition

  1. 1
    Any of many rod-shaped, nonmotile, aerobic bacteria, of the genus Lactobacillus, that ferment sugars to form lactic acid

Etymology

From the genus name. lacto- + bacillus

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 "lactobacillus"?
"lactobacillus" is spelled L-A-C-T-O-B-A-C-I-L-L-U-S.
What does "lactobacillus" mean?
As a noun, "lactobacillus" means: Any of many rod-shaped, nonmotile, aerobic bacteria, of the genus Lactobacillus, that ferment sugars to form lactic acid
What is the origin of the word "lactobacillus"?
From the genus name. lacto- + bacillus 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.

Similar English words by spelling shape

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

Same letter count

Frequency-ranked English headwords with 13 letters (nearest by frequency rank).

mainstreaming#60,943hydraulically#60,871overshadowing#61,007Pennsylvanian#61,019

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

Source: FrequencyWords open word-frequency list