Officially ordering or recommending something as a treatment, especially medicine, or laying down rules that people must follow.
From Latin 'praescribere' meaning to write beforehand, composed of 'prae-' (before) and 'scribere' (to write). Originally meant to establish rules in writing. Doctors adopted the term for writing treatment orders, and it broadened to mean recommending anything officially.
When a doctor prescribes medicine, they're literally 'writing before'—writing out your treatment in advance. This traces back to Roman military practice where commanders would write orders beforehand to prescribe soldier behavior. The same legal and administrative power that gave orders in ancient Rome now comes with your doctor's signature on a prescription pad.
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