- A cause of some infectious diseases - Disease carrier - Harmful computer program - Infective agent - Source of infection - Contagious or poisonous matter, as of specific ulcers,
the bite of snakes, etc.; -- applied to organic poisons. - The special contagion, inappreciable to the senses and
acting in exceedingly minute quantities, by which a disease is
introduced into the organism and maintained there.
- Bacterium - Bug - Microbe - microscopic organism - minute life form - Source of infection - That which is to develop a new individual; as, the germ of a
fetus, of a plant or flower, and the like; the earliest form under
which an organism appears.