(medicine, pharmacy, pharmacology) A written order from an authorized medical practitioner for provision of a medicine or other treatment, such as (ophthalmology) the specific lenses needed for a pair of glasses.

(of a drug, etc.) only available with a physician or nurse practitioner's written prescription

plural of prescription

Of or pertaining to prescribing or enjoining, especially an action or behavior based on a norm or standard.

In a prescriptive manner.

Something prescribed; a rule, regulation or dictate. / (obsolete) A medical prescription.

Directed; prescribed.

plural of prescript

The state or condition of being prescriptive.

The quality or state of being prescriptive.