pyrogen

A substance that produces fever.

Any substance which, introduced into the blood, causes pyrexia or fever.

The electric fluid.

A substance formed by the action of heat; specifically, a carbon compound formed in this way.

Electricity.

A poison separable from decomposed meat infusions, and supposed to be formed from albuminous matter through the agency of bacteria.

Any substance that produces fever, or a rise in body temperature

any substance that can cause a rise in body temperature

any substance characterized by its great flammability