= infector, n.

A person who or thing which infects another or spreads infection. Also (figurative) a corrupter of morals.

Originally: a person, animal, plant, or thing that acts as a source of contagion or infection. In later use spec.: an individual persistently…

A person or animal that is the source of infective material or virus used in vaccination against smallpox.

One who or that which fecundates.

An individual suffering from an infection; spec. an infected member of a population who is capable of transmitting infection to other members. Cf. s…

Medicine. A continuing source of pathogens for a particular disease, esp. an animal or plant that is not itself susceptible to the disease.