- (n.) A regular or characteristic response to a stimulation of the nerves.
- A test for typhoid fever based on the fact that blood serum of one affected, in a bouillon culture of typhoid bacilli, causes the bacilli to agglutinate and lose their motility.
- (n.) Backward tendency or movement after revolution, reform or great progress in any direction.
- (n.) An action induced by vital resistance to some other action; depression or exhaustion of vital force consequent on overexertion or overstimulation; heightened activity and overaction succeeding depression or shock.
- (n.) The mutual or reciprocal action of chemical agents upon each other or the action upon such chemical agents of some form of energy, as heat, light or electricity, resulting in a chemical change in one or more of these agents, with the production of new compounds or the manifestation of distinctive characters. See Blowpipe reaction, Flame reaction, under Blowpipe, and Flame.
- (n.) Any action in resisting other action or force; counter tendency; movement in a contrary direction; reverse action.
- (n.) The force which a body subjected to the action of a force from another body exerts upon the latter body in the opposite direction.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). reaction. Retrieved September 22, 2026, from http://smartdefine.org/reaction/definitions/2052878 |
| Chicago | Webster's. 2011. "reaction" http://smartdefine.org/reaction/definitions/2052878 (accessed September 22, 2026). |
| Harvard | Webster's 2011, reaction, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/reaction/definitions/2052878>. |
| MLA | Webster's. "reaction" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/reaction/definitions/2052878> |