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[in-fek-tiv] /ɪnˈfɛk tɪv/
Origin of infective
1350-1400; Middle English < Medieval Latin infectīvus. See infect, -ive
Related forms
infectiveness, infectivity, noun
uninfective, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for infective
  • And even bodies in the river tend to putrefy, making it difficult to predict how infective they might be.
  • They are also used to reduce the risk of infective endocarditis in patients with mitral valve prolapse who are having dental work.
  • The time interval from ingestion of infective eggs to oviposition by the adult females is about one month.
British Dictionary definitions for infective


capable of causing infection
a less common word for infectious
Derived Forms
infectively, adverb
infectiveness, infectivity, noun
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 infective

late 14c., from Latin infectivus, from infectus (see infect).

Online Etymology Dictionary, © 2010 Douglas Harper
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infective in Medicine

infective in·fec·tive (ĭn-fěk'tĭv)
Capable of producing infection; infectious.

in·fec'tive·ness or in'fec·tiv'i·ty n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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