a/c

noun

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

"a-c" is a 2-letter English headword indexed on PlainSpell.

The verdict

“a/c” 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
3
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Abbreviation of account.

Key facts for a/c
PropertyValue
Headworda/c
LanguageEnglish
Part of speechNoun
Letters3
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “a/c” sits in English frequency

a/c falls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for a/c is 3 letters long, classified as a noun. 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 generated misspelling entries exist for a/c in our index, typically a sign the spelling maps closely to how the word sounds. It is not paired with a close-neighbour confusable in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.

This entry carries no recorded etymology, so its spelling is easiest explained by how it's pronounced rather than where it came from. The correct English form is a/c, spelled A-/-C.

Definition

  1. 1
    Abbreviation of account.
  2. 2
    Initialism of air conditioning.
  3. 3
    Initialism of air conditioner.
  4. 4
    Initialism of aircraft.

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

How do you spell "a/c"?
"a/c" is spelled A-/-C.
What does "a/c" mean?
As a noun, "a/c" means: Abbreviation of account.
What language does "a/c" come from?
"a/c" is a English word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
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 “a/c”

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

  • The one correct English spelling is A-/-C - 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