Word.ws English Dictionary

Plural of placebo

regular plural

The plural of placebo is placebos or placeboes.

Forms of placebo

Singularplacebo /pləˈsiː.bəʊ/
Pluralplacebos
placeboes
Countablecountable

Placebos and placeboes in a sentence

  • The acid test, I thought, was whether homeopathic remedies behave differently from placebos when submitted to clinical trials.2010 February 22, Edzard Ernst, “No to homeopathy placebo”, in The Guardian
  • It's why I had my doctor take me off my placebos.2012 November 7, The Colbert Report, Stephen Colbert (actor). From the entry nocebo effect

Meaning of placebo

  1. noun A dummy medicine containing no active ingredients; an inert treatment.
  2. noun The vespers sung in the office for the dead.

Full definition of placebo

Questions about the plural of placebo

What is the plural of placebo?
The plural of placebo is placebos or placeboes.
Which is correct, placebos or placeboes?
Both are used. placebos is the more common of the two in English writing.
Is placebo countable?
Placebo is a countable noun.

Source and license

Adapted from Wiktionary: placebo (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

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Cite this page: “Plural of placebo.” Word.ws, https://word.ws/plural/placebo. Based on Wiktionary, CC BY-SA 4.0.