Reaction

Definition of Reaction

Re`ac´tion   Pronunciation: rė`ăk´shŭn
n.1.Any action in resisting other action or force; counter tendency; movement in a contrary direction; reverse action.
2.(Chem.) 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.
3.(Med.) 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.
4.(Mech.) The force which a body subjected to the action of a force from another body exerts upon the latter body in the opposite direction.
Reaction is always equal and opposite to action, that is to say, the actions of two bodies upon each other are always equal and in opposite directions.
- Sir I. Newton (3d Law of Motion).
5.(Politics) Backward tendency or movement after revolution, reform, or great progress in any direction.
The new king had, at the very moment at which his fame and fortune reached the highest point, predicted the coming reaction.
- Macaulay.
6.(Psycophysics) A regular or characteristic response to a stimulation of the nerves.
7.An action by a person or people in response to an event. The reaction may be primarily mental (" a reaction of surprise") but is usually manifested by some activity.
Reaction time
(Physiol.) in nerve physiology, the interval between the application of a stimulus to an end organ of sense and the reaction or resulting movement; - called also physiological time.
Reaction wheel
(Mech.) a water wheel driven by the reaction of water, usually one in which the water, entering it centrally, escapes at its periphery in a direction opposed to that of its motion by orifices at right angles, or inclined, to its radii.

Related Words

Bourbonism, Toryism, acknowledgment, action and reaction, aeromotor, affect, affection, answer, answering, antagonism, antipathy, antiphon, assumption, attitude, back answer, back talk, backchat, backlash, backset, backsliding, backward motion, backward step, backwardness, backwash, brain disease, challenge, clashing, climate of opinion, clout, collision, combative reaction, comeback, common belief, community sentiment, compensation, complaint, conceit, concept, conception, conclusion, conflict, confutation, consensus gentium, conservatism, conservativeness, consideration, contradiction, contraposition, contrariety, counteraction, counterbalance, counterposition, counterworking, crack-up, crankiness, crotchetiness, defiance, demur, die-hardism, dispute, dissent, dissentience, echo, effect, emotion, emotional charge, emotional disorder, emotional instability, emotional shade, estimate, estimation, ethos, evasive reply, experience, extreme right, extreme right wing, extreme rightism, eye, feedback, feeling, feeling tone, force, foreboding, fractiousness, friction, functional nervous disorder, general belief, gut reaction, heartthrob, idea, impact, impress, impression, imprint, insanity, interference, jet power, jet propulsion, judgment, kick, know-nothingism, laissez-faireism, lapse, lights, maladjustment, manic-depressive psychosis, mark, melancholia, mental disorder, mental illness, mind, monarchism, mystique, negativism, nervous breakdown, nervous disorder, neurosis, nonconformity, noncooperation, notion, objection, observation, obstinacy, old school tie, opinion, opposition, opposure, oppugnance, oppugnancy, paranoia, passion, passive resistance, personal judgment, personality disorder, perverseness, point of view, popular belief, position, posture, power plant, presentiment, presumption, prevailing belief, print, problems in living, profound sense, protest, psychosis, public belief, public opinion, radical rightism, ram-jet propulsion, reaction propulsion, reactionariness, reactionaryism, ready reply, rebuff, recalcitrance, recalcitrancy, recalcitration, receipt, recession, recidivation, recidivism, reciprocation, recoil, reentry, reflex, refluence, reflux, refractoriness, regress, regression, rejoinder, relapse, reluctance, remonstrance, renitence, renitency, repartee, repellence, repellency, repercussion, replication, reply, repost, reprisal, repugnance, repulse, repulsion, rescript, rescription, resistance, resojet propulsion, respondence, responsion, responsory, retaliation, retort, retroaction, retrocession, retroflexion, retrogradation, retrogression, retrusion, return, revenge, reverberation, revolt, rightism, riposte, rocket power, rocket propulsion, rollback, royalism, schizophrenia, sensation, sense, sentiment, setback, short answer, sight, snappy comeback, social Darwinism, social maladjustment, stance, stand, standpattism, sternway, swimming upstream, theory, thinking, thought, throwback, turbojet propulsion, ultraconservatism, uncooperativeness, undercurrent, unprogressiveness, view, way of thinking, withstanding, witty reply, witty retort, yes-and-no answer
Word:

Browse

Re-present
Re-presentation
Re-reiterate
Re-resolve
Re-search
Re-sign
Re-sound
Re-store
Re-turn
Reabsorb
Reabsorption
Reaccess
Reaccuse
Reach
Reachable
Reacher
Reachless
React
Reactance
Reactance coil
-Reaction-
Reaction time
Reaction wheel
Reactionary
Reactionist
Reactive
Reactor
Read
Readability
Readable
Readdress
Readept
Readeption
Reader
Readership
Readily
Readiness
Reading
Reading book
Reading desk
Reading glass
# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

© 2014 Delaflex, Inc.Dictionary Home