Origin of infective
Related formsin·fec·tive·ness, in·fec·tiv·i·ty, nounun·in·fec·tive, adjective
First recorded in 1350–1400; Middle English
word from Medieval Latin
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for infectivity
Historical Examples of infectivity
The high mortality and infectivity of this epidemic strongly suggest it.
Thus far I have considered the problem of marriage from the standpoint of infectivity.
No doubt is any longer entertained of its infectious character, though the degree of infectivity appears to vary considerably.
On the infectivity of tabardillo or Mexican typhus for monkeys, and studies on its mode of transmission.
British Dictionary definitions for infectivity
Derived Formsinfectively, adverbinfectiveness or infectivity, noun
capable of causing infection
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 infectivity
late 14c., from Latin infectivus, from infectus (see infect).
Online Etymology Dictionary, © 2010 Douglas Harper
Related formsin•fec′tive•ness null n.
Capable of producing infection; infectious.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.