infectious
/ɪnˈfɛk.ʃəs/ adjective B2- 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.· More infectious diseases like the flu are usually less potent.
- Able to infect others; capable of transmitting pathogens. · Despite feeling better, the patient is still infectious.
- Spreading quickly from one person to another. · infectious smile· Her enthusiasm for work can be really infectious.
- Memorable and invoking excitement or interest. · Pop music is more infectious than elevator music.
From the library
Indeed, his mood was infectious, for I lay tossing half the night myself, brooding over this strange problem, and inventing a hundred theories, each of which was more impossible than the last.
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