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infectious

Pronunciation: /ɪnˈfɛk.ʃəs/

The English word “infectious” has 4 meanings listed here.

adjective

  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).
  2. Able to infect others; capable of transmitting pathogens.
  3. Spreading quickly from one person to another.
  4. Memorable and invoking excitement or interest.

Etymology

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

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