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soporiferous

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Webster's 1828 Dictionary

SOPORIFEROUS

a.[L. soporifer; sopor, asleep, and fero, to bring; from sopio, to lull to sleep. ] Causing sleep, or tending to produce it; narcotic; opiate; anodyne; somniferous. The poppy pssesses soporiferous qualities.

SOPORIFEROUSNESS

n.The quality of causing sleep.

Webster's 1913 Dictionary

SOPORIFEROUS

Sop `o *rif "er *ous, a. Etym: [L. soparifer; sopor a heavy sleep +ferere to bring. ]

Defn: Causing sleep; somniferous; soporific. "Soporiferous medicine. " Swift. --- Sop `o *rif "er *ous *ly, adv. -- Sop `o *rif "er *ous *ness, n.