Definition of soporific
(Entry 1 of 2)
1a
: causing or tending to cause sleep
soporific drugs
b
: tending to dull awareness or alertness
2
: of, relating to, or marked by sleepiness or lethargy
soporific
noun
Definition of soporific (Entry 2 of 2)
: a soporific agent
specifically
: hypnotic sense 1
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Merriam-Webster unabridged
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The first known use of soporific was in 1665
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