The Collaborative International Dictionary
Soporous
Soporose \Sop"o*rose`\, Soporous \Sop"o*rous\, a. [From Sopor; cf. L. soporus, fr. sopor a heavy sleep; F. soporeux.] Causing sleep; sleepy.
Wiktionary
soporous
a. Causing sleep; sleepy. alt. Causing sleep; sleepy.