observatorium
"observatorium" is a 13-letter English headword indexed on PlainSpell.
The verdict
“observatorium” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 13
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An observatory.
Corpus desk
Index EN-observatorium · observatorium · English
observatorium · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-MEGA 13 letters
- VOW-6 6 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "O" thin
- PHOTO-UNK Peer pending
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.
| Property | Value |
|---|---|
| Headword | observatorium |
| Language | English |
| Part of speech | Noun |
| Letters | 13 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “observatorium” in English
Rare enough to double-check
observatorium is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "An observatory.".
observatorium has no tracked misspelling variants, since its letter pattern doesn't lend itself to common typo substitutions. Our confusable-pair dataset has no match for it, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: From Latin observātōrium. The correct English form is observatorium, spelled O-B-S-E-R-V-A-T-O-R-I-U-M.
Definition
- 1An observatory.
Recorded use
Wiktionary examplesThese source excerpts show how observatorium appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The obſervatorium, built by Chriſtian VI. in ſuch a manner that a coach and horſes may aſcend to the top; here they keep the public library, and Tycho Brahe’s mathematical inſtruments, eſpecially his famous celeſtial globes, which are three yards thick in diameter.
When all the persons whom br. O. had the purpose of visiting had been seen and he had done all he could for the Master, he visited the observatorium from the top of which there is a fine view of the surrounding country.
Etymology
From Latin observātōrium.
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.