To give directions, either orally or in writing, for the preparation and administration of a remedy to be used in the treatment of any disease. [L. prae-scribo, pp. -scriptus, to write before]
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pre·scribe pri-'skrīb vb, pre·scribed; pre·scrib·ing vi to write or give medical prescriptions vt to designate or order the use of as a remedy <\prescribe a drug>
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pre·scribe (pre-skrībґ) [L. praescribere to write before] to designate in writing a remedy for administration.Medical dictionary. 2011.