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Infectious

//ɪnˈfɛk.ʃəs// adj, slang

Definitions

Adjective
  1. 1
    Caused by an agent that enters the host's body (such as a bacterium, virus, parasite, or prion); often, also, transmitted among hosts via any of various routes (for example, contact, droplet-borne, airborne, waterborne, foodborne, fomite-borne, or bloodborne).

    "Cancer is usually not infectious."

  2. 2
    Able to infect others; capable of transmitting pathogens.

    "Despite feeling better, the patient is still infectious."

  3. 3
    Spreading quickly from one person to another.

    "infectious smile"

  4. 4
    Memorable and invoking excitement or interest. informal

    "Pop music is more infectious than elevator music."

Adjective
  1. 1
    easily spread wordnet
  2. 2
    caused by infection or capable of causing infection wordnet
  3. 3
    of or relating to infection wordnet

Etymology

Borrowed from New Latin īnfectiōsus. By surface analysis, infect + -ious.

See also for "infectious"

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