PSO

English

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PSO^¹

noun PSOs

abbreviation, countable, initialism, uncountable Initialism of public safety officer
Australia, abbreviation, countable, initialism, uncountable Initialism of protective services officer
abbreviation, countable, initialism, uncountable Initialism of penalty shootout
abbreviation, countable, initialism, uncountable Initialism of protostellar object
abbreviation, countable, uncountable Abbreviation of psoriasis
abbreviation, countable, initialism, uncountable Initialism of pipeline state object

proper noun

Pakistan, abbreviation, initialism Initialism of Pakistan State Oil
abbreviation, initialism Initialism of Phantasy Star Online Next up, graphics: this is early DC territory, looking like Nomad Soul. Up against the likes of PSO, it looks horrifically dated.

PsO^²

Where it comes from

The spelling was probably influenced by PsA (“psoriatic arthritis”).

noun PsOs

abbreviation, countable, uncountable Abbreviation of psoriasis

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Cite this

MLA

"PSO." Wiktionary, via Micwyn, micwyn.com/word/pso. Accessed 6 Nov. 2026.

APA

PSO. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/pso

Chicago

"PSO." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/pso.

BibTeX

@misc{pso_2026,
  title = {PSO},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/pso},
  urldate = {2026-11-06}
}

PSO