tubulin

noun

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

"tubulin" is a 7-letter English headword indexed on PlainSpell.

The verdict

“tubulin” is uncommon English (frequency #75,511 among 27,828 “T” headwords), classed as a noun. The kind of spelling people second-guess.

#75,511
frequency rank, English
27,828
“T” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Any of a group of proteins used as the material for microtubules.

Key facts for tubulin
PropertyValue
Headwordtubulin
LanguageEnglish
Part of speechNoun
Letters7
Frequency rank#75,511
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “tubulin” 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). tubulin lands here:

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

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

Rare enough to double-check

tubulin is uncommon English at frequency #75,511 among 27,828 “T” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.

No misspelling variants are generated for tubulin in our index, suggesting the orthography follows predictable English patterns. No confusable counterpart is on file for this word, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From tubul- + -in. The correct English form is tubulin, spelled T-U-B-U-L-I-N.

Definition

  1. 1
    Any of a group of proteins used as the material for microtubules.
  2. 2
    Specifically, the dimer of α-tubulin and β-tubulin.

Etymology

From tubul- + -in.

This word in other languages

tubuline(Français)

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 "tubulin"?
"tubulin" is spelled T-U-B-U-L-I-N.
What does "tubulin" mean?
As a noun, "tubulin" means: Any of a group of proteins used as the material for microtubules.
What is the origin of the word "tubulin"?
From tubul- + -in. 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.

Using “tubulin”

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

  • The one correct English spelling is T-U-B-U-L-I-N - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words

Other uncommon English words near this rank

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