Search Result for "soporiferous": 
Wordnet 3.0

ADJECTIVE (2)

1. sleep inducing;
[syn: soporific, soporiferous, somniferous, somnific, hypnogogic, hypnagogic]

2. inducing mental lethargy;
- Example: "a narcotic speech"
[syn: narcotic, soporiferous, soporific]



The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]


WordNet (r) 3.0 (2006):

soporiferous
    adj 1: sleep inducing [syn: soporific, soporiferous,
           somniferous, somnific, hypnogogic, hypnagogic]
    2: inducing mental lethargy; "a narcotic speech" [syn:
       narcotic, soporiferous, soporific]