GC: n

S: http://pharmafactz.com/what-is-pharmacology/ (last access: 29 June 2017); http://www.ema.europa.eu/docs/en_GB/document_library/Presentation/2013/01/WC500137015.pdf (last access: 29 June 2017).

N: 1. 1805–15; < Greek póso(s) how much + -logy.
The branch of pharmacology dealing with the determination of dosage.
2. A branch of medical science concerned with dosage.
3. As nouns the difference between dosage and posology is that dosage is the administration of a medication etc, in a measured amount; dosing while posology is (pharmacy) the study of the dosages of drugs, especially the determination of appropriate dosages.

S: 1. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005 – http://www.thefreedictionary.com/posology (last access: 29 June 2017). 2. MW – https://www.merriam-webster.com/medical/posology (last access: 29 June 2017). 3. http://wikidiff.com/dosage/posology (last access: 29 June 2017).

SYN:
S:

CR: dosage, dose, pharmacology.