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infectious

[in-fek-shuh s]
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adjective
  1. communicable by infection, as from one person to another or from one part of the body to another: infectious diseases.
  2. causing or communicating infection.
  3. tending to spread from one to another: infectious laughter.
  4. Law. capable of contaminating with illegality; exposing to seizure or forfeiture.
  5. Obsolete. diseased.
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Origin of infectious

First recorded in 1535–45; infect(ion) + -ious
Related formsin·fec·tious·ly, adverbin·fec·tious·ness, nounnon·in·fec·tious, adjectivenon·in·fec·tious·ly, adverbnon·in·fec·tious·ness, nounun·in·fec·tious, adjectiveun·in·fec·tious·ly, adverbun·in·fec·tious·ness, noun
Can be confusedcontagious infectious (see synonym study at contagious)

Synonyms

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1. catching.

Synonym study

1. See contagious.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for non-infectious

Historical Examples

  • Consequently, lymphangitis may be considered as infectious and non-infectious.

    Lameness of the Horse

    John Victor Lacroix

  • Into this laudable and non-infectious state these two persons present come now to be joined and quarantined.

  • Therefore, one might well classify affections of the feet as infectious and non-infectious.

    Lameness of the Horse

    John Victor Lacroix

  • In the class of non-infectious affections one may consider conditions such as laminitis, strain and fractures.

    Lameness of the Horse

    John Victor Lacroix

  • Such cases were of the non-infectious type and recovery was possible within three or four weeks.

    Lameness of the Horse

    John Victor Lacroix


British Dictionary definitions for non-infectious

infectious

adjective
  1. (of a disease) capable of being transmittedCompare contagious
  2. (of a disease) caused by microorganisms, such as bacteria, viruses, or protozoa
  3. causing or transmitting infection
  4. tending or apt to spread, as from one person to anotherinfectious mirth
  5. international law
    1. tainting or capable of tainting with illegality
    2. rendering liable to seizure or forfeiture
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Derived Formsinfectiously, adverbinfectiousness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for non-infectious

infectious

adj.

"catching, having the quality of spreading from person to person," 1540s of diseases, 1610s of emotions, actions, etc.; see infect + -ous.

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Online Etymology Dictionary, © 2010 Douglas Harper

non-infectious in Medicine

infectious

(ĭn-fĕkshəs)
adj.
  1. Capable of causing infection.
  2. Caused by or capable of being transmitted by infection.
  3. Caused by a pathogenic microorganism or agent.
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Related formsin•fectious•ness n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

non-infectious in Science

infectious

[ĭn-fĕkshəs]
  1. Capable of causing infection. See Note at contagious.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.