homatropine
noun
hom·at·ro·pine
| \ hō-ˈma-trə-ˌpēn
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Medical Definition of homatropine
: a poisonous crystalline ester of tropine and mandelic acid used in the form of its hydrobromide C16H21NO3·HBr for dilating the pupil of the eye and in the form of its methyl bromide C16H21NO3·CH3Br in combination with hydrocodone in cough supressant preparations — see hycodan