The Collaborative International Dictionary
Soporiferousness
Soporiferous \Sop`o*rif"er*ous\, a. [L. soparifer; sopor a heavy
sleep + ferere to bring.]
Causing sleep; somniferous; soporific. ``Soporiferous
medicine.''
--Swift.
[1913 Webster] -- Sop`o*rif"er*ous*ly, adv. --
Sop`o*rif"er*ous*ness, n.