[puh-sol-uh-jee, poh-]
the branch of pharmacology dealing with the determination of dosage.

1805–15; < Greek póso(s) how much + -logy

posologic [pos-uh-loj-ik] , posological, adjective
posologist, noun
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World English Dictionary
posology (pəˈsɒlədʒɪ)
the branch of medicine concerned with the determination of appropriate doses of drugs or agents
[C19: from French posologie, from Greek posos how much]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

posology po·sol·o·gy (pə-sŏl'ə-jē, pō-)
The medical or pharmacological study of the dosages of medicines and drugs.

po'so·log'ic (pō'sə-lŏj'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
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Example sentences
The control group used the same posology of placebo similar products.
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