A.D.
"a-d" is a 2-letter English headword indexed on PlainSpell.
The verdict
“A.D.” is uncommon English (outside the top frequency list), classed as an adverb. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 4
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Alternative form of AD; initialism of anno Domini.
Corpus desk
Index EN-a-d · A.D. · English
A.D. · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-MID 4 letters
- VOW-1 1 vowel
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "A" 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 | A.D. |
| Language | English |
| Part of speech | Adverb |
| Letters | 4 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “A.D.” in English
Rare enough to double-check
A.D. is uncommon English outside the top frequency list, classed as anadverb. Rarity is why readers land here mid-draft. Gloss: "Alternative form of AD; initialism of anno Domini.".
No misspelling variants are generated for A.D. in our index, which points to an orthography that plays by predictable English rules. This headword has no recorded confusable partner, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
No borrowing history is documented for this entry, so its spelling pattern is best understood through pronunciation rather than a traceable origin. The correct English form is A.D., spelled A-.-D-..
Definition
- 1Alternative form of AD; initialism of anno Domini.
Recorded use
Wiktionary examplesThese source excerpts show how A.D. appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
In China, surviving single pagodas at the Fo-kung Temple, Ying Hsien, Shansi, and at the P'u-shou Temple in Hopei, both dating from the eleventh century A.D., no doubt indicate persistence of this earliest plan under the architecturally conservative Liao (p. 709) long after it had disappeared in more metropolitan areas.
Their greatest discovery came on an expedition in 1937 when they dated and meticulously catalogued Foguang Si, or the Temple of Buddha’s Light, in Wutai County, Shanxi Province. The breathtaking wooden temple was built in 857 A.D., making it the oldest building known in China at the time. (It is now the fourth-oldest known).
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.