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British Dictionary definitions for agrypnotic

agrypnotic

adjective
  1. obsolete inducing, relating to, or characterized by insomnia
noun
  1. obsolete a drug or agent that induces insomnia

Word Origin

C20: from Greek agrupnos wakeful, from agrein to pursue + hupnos sleep
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012