[puh-sol-uh-jee, poh-]


the branch of pharmacology dealing with the determination of dosage.

Origin of posology

1805–15; < Greek póso(s) how much + -logy
Related formspos·o·log·ic [pos-uh-loj-ik] /ˌpɒs əˈlɒdʒ ɪk/, pos·o·log·i·cal, adjectivepo·sol·o·gist, noun
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British Dictionary definitions for posology



the branch of medicine concerned with the determination of appropriate doses of drugs or agents
Derived Formsposological (ˌpɒsəˈlɒdʒɪkəl), adjective

Word Origin for posology

C19: from French posologie, from Greek posos how much
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

posology in Medicine


[pə-sŏlə-jē, pō-]


The medical or pharmacological study of the dosages of medicines and drugs.
Related formspo′so•logic (pō′sə-lŏjĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.