demecarium
noun
dem·e·car·i·um
| \ ˌdem-i-ˈkar-ē-əm, -ˈker-
\
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Medical Definition of demecarium
: a long-acting cholinesterase-inhibiting quaternary ammonium compound that is a derivative of neostigmine and is used as the bromide C32H52Br2N4O4 in an ophthalmic solution especially in the treatment of glaucoma and esotropia