pyrimethamine

[pahy-ruh-meth-uh-meen, -min]

py·ri·meth·a·mine

[pahy-ruh-meth-uh-meen, -min]
noun Pharmacology.
a potent substance, C12H13ClN4, used against susceptible plasmodia in the prophylactic treatment of malaria and against Toxoplasma gondi in the treatment of toxoplasmosis.

Origin:
1950–55; pyrim(idine) + eth(yl) + -amine
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Pyrimethamine has a plethora of syllables.
So is floccinaucinihilipilification. Does it mean:
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S.
American Heritage
Medical Dictionary

pyrimethamine py·ri·meth·a·mine (pī'rə-měth'ə-mēn', -mĭn)
n.
A potent folic acid antagonist used as a prophylactic antimalarial agent against Plasmodium falciparum and in the treatment of toxoplasmosis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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