pharmacodynamics

1 of 2

noun

phar·​ma·​co·​dy·​nam·​ics ˌfär-mə-kō-dī-ˈna-miks How to pronounce pharmacodynamics (audio)
-də-
plural in form but singular in construction
: a branch of pharmacology dealing with the reactions between drugs and living systems
pharmacodynamic adjective
pharmacodynamically adverb

pharmacodynamic

2 of 2

adjective

phar·​ma·​co·​dynamic
: of, relating to, or used in pharmacodynamics
responses of the autonomic nervous system to various pharmacodynamic substancesPsychosomatic Medicine
pharmacodynamically adverb

Word History

Etymology

Adjective

pharmacodynamics

First Known Use

Noun

circa 1842, in the meaning defined above

Time Traveler
The first known use of pharmacodynamics was circa 1842

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Cite this Entry

“Pharmacodynamics.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pharmacodynamics. Accessed 25 Jun. 2026.

Medical Definition

pharmacodynamics

noun, plural in form but singular in construction
phar·​ma·​co·​dy·​nam·​ics ˌfär-mə-kō-dī-ˈnam-iks, -də- How to pronounce pharmacodynamics (audio)
: a branch of pharmacology dealing with the reactions between drugs and living systems
pharmacodynamic adjective
pharmacodynamically adverb

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