n.

1. 命令，指示；规定，法规[C]
2. 处方，药方；处方上开的药[C]
   These pills can be obtained by prescription only.

   这些药丸只有凭医生处方才能买到。

3. 惯例；传统[C]
4. 【律】法定期限，时效

a.[Z]

1. 凭处方方可购买的；根据处方配制的

n.

1. an instruction written by a medical practitioner that authorizes a patient to be issued with a medicine or treatment.
2. the action of prescribing.
3. an authoritative recommendation or ruling.
4. (also positive prescription) Law  the establishment of a claim founded on the basis of long usage or custom.