diacodium

diacodium

(ˌdaɪəˈkəʊdɪəm) or

diacodion

n
(in pre-modern medicine) a herbal remedy made chiefly from poppies, acting as an opiate and thus used to aid sleep
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014