Word.ws English Dictionary

apo

apo adjective: in an inactive, unbound state. Also the clipping of apolipoprotein.

Adjective

apo (not comparable)

  1. In an inactive, unbound state
    • In this scenario, unbound proteins are predominantly in the ligand-free ("apo") structure.2009 January 30, Robert B. Best, Gerhard Hummer, “BIOCHEMISTRY: Unfolding the Secrets of Calmodulin”, in Science

Noun capitalized: APO

APO

  1. Air Post Office (both Army and Air Force)
  2. Army Post Office
  3. Air Force Post Office
  4. (abbreviation, initialism) Initialism of acute pulmonary oedema.

Also used as

apo is also the clipping of apolipoprotein.

Forms of apo

pluralapos

Questions about apo

What does apo mean?
Apo means in an inactive, unbound state.
What part of speech is apo?
Apo can be an adjective or a noun.

Words near apo in the dictionary

  1. apnosticism
  2. APNS
  3. apnœa
  4. apnœal
  5. apnœic
  6. apo
  7. apo koinou
  8. apo-
  9. apoaequorin
  10. apoaequorins
  11. apoapse

Source and license

Adapted from Wiktionary: apo (page history and authors); APO (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.

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