: by way of the mouth
medication administered per os
infection per os

Dictionary Entries Near per os

Cite this Entry

“Per os.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/per%20os. Accessed 28 Sep. 2023.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!