✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

posology

noun

po·​sol·​o·​gy pō-ˈsäl-ə-jē How to pronounce posology (audio) -ˈzäl- How to pronounce posology (audio)
plural posologies
: a branch of medical science concerned with dosage

Cite this Entry

“Posology.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/posology. Accessed 26 Nov. 2025.

Love words? Need even more definitions?

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