prn

abbreviation

as needed; as the circumstances require

Word History

Etymology

Latin pro re nata

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“Prn.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prn. Accessed 27 Feb. 2025.

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Medical Definition

prn

abbreviation
as needed; as the circumstances require
—used in writing prescriptions
Etymology

Latin pro re nata

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