An antitussive drug, C18 H25 NO, that is used in its hydrobromide form and is less addictive than codeine.
American Heritage Medicine
Origin of Dextromethorphan
dextro– meth– (m)orph(in)an structural basis for a group of opioids (morphin(e)) (–an)
From American Heritage Dictionary of the English Language, 5th Edition
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