preventive

[pri-ven-tiv]
adjective
1.
Medicine/Medical. of or noting a drug, vaccine, etc., for preventing disease; prophylactic.
2.
serving to prevent or hinder: preventive measures.
noun
3.
Medicine/Medical. a drug or other substance for preventing disease.
4.
a preventive agent or measure.
Also, preventative [pri-ven-tuh-tiv] , (for defs 2, 4).


Origin:
1630–40; prevent + -ive

preventively, adverb
preventiveness, noun
nonpreventive, adjective
nonpreventively, adverb
nonpreventiveness, noun
unpreventative, adjective
unpreventive, adjective
unpreventively, adverb
unpreventiveness, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
preventive (prɪˈvɛntɪv, prɪˈvɛntətɪv)
 
adj
1.  tending or intended to prevent or hinder
2.  med
 a.  tending to prevent disease; prophylactic
 b.  of or relating to the branch of medicine concerned with prolonging life and preventing disease
3.  (in Britain) of, relating to, or belonging to the customs and excise service or the coastguard
 
n
4.  something that serves to prevent or hinder
5.  med any drug or agent that tends to prevent or protect against disease
6.  another name for contraceptive
 
pre'ventively
 
adv
 
pre'ventiveness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

preventive pre·ven·tive (prĭ-věn'tĭv) or pre·ven·ta·tive (-tə-tĭv)
adj.
Preventing or slowing the course of an illness or a disease; prophylactic. n.
A preventive agent or treatment.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Consult your doctor about shots and other preventive measures before your trip.
Preventive measures to mitigate human-predator conflict are now commonly
  employed by ranchers.
But they also emphasize primary care and preventive care, addressing diseases
  and problems before they become major.
Other features act as preventive measures, shielding kids from unwanted contact
  with those outside their network.
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