noun. One that reacts to a stimulus.

noun. A circuit element, such as a coil, used to introduce reactance.

noun. undefined

noun. A chemical reactor.

noun. A nuclear reactor.

noun. One who or that which reacts; specifically: In electricity, a reactive coil.

noun. In experimental psychology, the observer in a reaction experiment; the person who executes a movement in response to a prearranged sensory stimulus.

noun. A choking coil.

noun. A nuclear reactor.

noun. A person who behaves in response to a suggestion, stimulation or some other influence.

noun. A structure used to contain chemical or other reactions.

noun. A device which uses atomic energy to produce heat.

noun. A chemical substance which responds to the presence or contact with another substance.

noun. (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements

noun. an electrical device used to introduce reactance into a circuit