per orum

English

Etymology

From per, borrowing from classical Latin per (“through”), and orum as incorrectly formed accusative of ōs (“mouth”)

Adverb

per orum

  1. (US, medicine) Alternative form of per orem per os; via the mouth; orally

Usage notes
  • The declined form is erroneous.[1] Proper Latin would be per os. This (per orum) is an alternative form of per orem, itself an ungrammatical form of per os.[1]

References
  1. Klonk M. "Per orem" out of place in medical literature. The Medical World. 1911;29(1):296.
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