Word.ws English Dictionary

a/a

a/a is the initialism of antiaircraft.

Noun capitalized: A/A

A/A

  1. (abbreviation, initialism) Initialism of agnostics/atheists.

Symbol capitalized: a/A

a/A

  1. Arterial to alveolar oxygen ratio.(used for diagnosing hypoxemia)

Forms of a/a

alternative formAA
alternative formA.A.

Questions about a/a

What does a/a mean?
A/a means arterial to alveolar oxygen ratio.(used for diagnosing hypoxemia).
What is a/a the initialism of?
A/a is the initialism of antiaircraft.
What part of speech is a/a?
A/a can be a noun or a symbol.

Words near a/a in the dictionary

  1. a.u.s
  2. A.U.S.A.
  3. A.U.S.A.s
  4. A/3C
  5. A/3Cs
  6. a/a
  7. A/B
  8. A/B test
  9. A/B testing
  10. A/B tests
  11. A/B/O

Source and license

Adapted from Wiktionary: a/a (page history and authors); A/A (page history and authors); a/A (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “a/a.” Word.ws, https://word.ws/a%2Fa. Based on Wiktionary, CC BY-SA 4.0.