phosphatidylinositol

noun

"phosphatidylinositol" is a 20-letter English headword indexed on PlainSpell.

The verdict

“phosphatidylinositol” is an uncommon English word, ranked #99,701 in English word frequency and used as a noun.

#99,701
frequency rank, English
20
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - a phospholipid containing inositol

Key facts for phosphatidylinositol
PropertyValue
Headwordphosphatidylinositol
LanguageEnglish
Part of speechNoun
Letters20
Frequency rank#99,701
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “phosphatidylinositol” 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). phosphatidylinositol 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 phosphatidylinositol is 20 letters long, classified as a noun. Corpus data places it at rank #99,701 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "a phospholipid containing inositol".

Our edit-distance generator produced no likely misspellings for phosphatidylinositol, and the word's spelling is regular enough that our generator found nothing worth flagging. We don't track a confusable pairing for this entry, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From phosphatidyl + inositol. The correct English form is phosphatidylinositol, spelled P-H-O-S-P-H-A-T-I-D-Y-L-I-N-O-S-I-T-O-L.

Definition

  1. 1
    a phospholipid containing inositol

Etymology

From phosphatidyl + inositol.

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 "phosphatidylinositol"?
"phosphatidylinositol" is spelled P-H-O-S-P-H-A-T-I-D-Y-L-I-N-O-S-I-T-O-L.
What does "phosphatidylinositol" mean?
As a noun, "phosphatidylinositol" means: a phospholipid containing inositol
What is the origin of the word "phosphatidylinositol"?
From phosphatidyl + inositol. 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 “phosphatidylinositol”

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

  • The one correct English spelling is P-H-O-S-P-H-A-T-I-D-Y-L-I-N-O-S-I-T-O-L - 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