Through the mouth, denoting a method of medication or an approach. [L. per, through, + os (or-), mouth]
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per·oral (.)pər-'ōr-əl, pe(ə)r-, -'ȯr-, -'är- adj done, occurring, or obtained through or by way of the mouth <\peroral administration of a drug> <\peroral infection>
per·oral·ly -ə-lē adv
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per·oral (pər-orґəl) [per- + oral] performed through or administered through the mouth.Medical dictionary. 2011.