interstitium
/ˌɪntɚˈstɪʃi.əm/
"interstitium" is a 12-letter English headword indexed on PlainSpell.
The verdict
“interstitium” is outside the top-ranked English vocabulary, used as a noun - the kind of word writers most often double-check.
- Unranked
- below top-frequency English
- 12
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - An interstitial space within a tissue or organ.
| Property | Value |
|---|---|
| Headword | interstitium |
| Language | English |
| Part of speech | Noun |
| IPA | /ˌɪntɚˈstɪʃi.əm/ |
| Letters | 12 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “interstitium” sits in English frequency
Spelling & Dictionary Insight
The English entry for interstitium is 12 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˌɪntɚˈstɪʃi.əm/. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.
No misspelling variants are generated for interstitium in our index, since its letter pattern doesn't lend itself to common typo substitutions. No confusable counterpart is on file for this word, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
Etymologically, the entry records: From Latin interstitium, from inter (“between”) + sistō (“to stand, place”). The correct English form is interstitium, spelled I-N-T-E-R-S-T-I-T-I-U-M.
Definition
- 1An interstitial space within a tissue or organ.
- 2Specifically the tissue between the pulmonary alveoli and the bloodstream.
- 3A state between systems or spaces.
- 4An interstice, the interval of time required by the Roman Catholic Church between the attainment of different degrees of an order (pluralised as interstitia for the overall policy, which is also occasionally spelled instertitia).
Etymology
From Latin interstitium, from inter (“between”) + sistō (“to stand, place”).
This word in other languages
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “interstitium”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-N-T-E-R-S-T-I-T-I-U-M - every other letter order is a misspelling in standard orthography.
- Say it as /ˌɪntɚˈstɪʃi.əm/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- 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.