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sedative

[sed-uh-tiv] /ˈsɛd ə tɪv/
adjective
1.
tending to calm or soothe.
2.
allaying irritability or excitement; assuaging pain; lowering functional activity.
noun
3.
a sedative drug or agent.
Origin
late Middle English
1375-1425
1375-1425; late Middle English (adj.) (< Middle French sédatif) < Medieval Latin sēdātīvus, equivalent to Latin sēdāt(us) (see sedate) + -īvus -ive
Related forms
unsedative, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un sedative

sedative

/ˈsɛdətɪv/
adjective
1.
having a soothing or calming effect
2.
of or relating to sedation
noun
3.
(med) a sedative drug or agent
Word Origin
C15: from Medieval Latin sēdātīvus, from Latin sēdātus assuaged; see sedate1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for un sedative

sedative

adj.

"tending to calm or soothe," early 15c., from Medieval Latin sedativus "calming, allaying," from sedat-, past participle stem of sedare, causative of sedere "to sit" (see sedentary). The noun derivative meaning "a sedative drug" is attested from 1785. Hence, "whatever soothes or allays."

Online Etymology Dictionary, © 2010 Douglas Harper
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un sedative in Medicine

sedative sed·a·tive (sěd'ə-tĭv)
adj.
Having a soothing, calming, or tranquilizing effect; reducing or relieving anxiety, stress, irritability, or excitement. n.
An agent or a drug that produces a soothing, calming, or tranquilizing effect.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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un sedative in Science
sedative
  (sěd'ə-tĭv)   
A drug having a calming or quieting effect, often given to reduce anxiety or to promote relaxation.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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