change-up
change-of-pace
change-of-pace ball
off-speed pitch | a baseball thrown with little velocity when the batter is expecting a fastball |
| reaction | doing something in opposition to another way of doing it that you don't like, his style of painting was a reaction against cubism |
speed
speeding
hurrying | changing location rapidly |
| speed skating | competitive skating on speed skates (usually around an oval course) |
reaction
response | a bodily process occurring due to the effect of some antecedent stimulus or agent, a bad reaction to the medicine, his responses have slowed with age |
immune response
immune reaction
immunologic response | a bodily defense reaction that recognizes an invading substance (an antigen: such as a virus or fungus or bacteria or transplanted organ) and produces antibodies specific against that antigen |
anamnestic response
anamnestic reaction | renewed rapid production of an antibody on the second (or subsequent) encounter with the same antigen |
reflex
reflex response
reflex action
instinctive reflex
innate reflex
inborn reflex
unconditioned reflex
physiological reaction | an automatic instinctive unlearned reaction to a stimulus |
conditional reflex
conditioned reflex
acquired reflex
conditional reaction
conditioned reaction
conditional response
conditioned response | an acquired response that is under the control of (conditional on the occurrence of) a stimulus |
learned reaction
learned response | a reaction that has been acquired by learning |
startle response
startle reaction | a complicated involuntary reaction to a sudden unexpected stimulus (especially a loud noise), involves flexion of most skeletal muscles and a variety of visceral reactions |
| transfusion reaction | reaction of the body to a transfusion of blood that is not compatible with its own blood, an adverse reaction can range from fever and hives to renal failure and shock and death |
amphetamine
pep pill
upper speed | a central nervous system stimulant that increases energy and decreases appetite, used to treat narcolepsy and some forms of depression |
reaction-propulsion engine
reaction engine | a jet or rocket engine based on a form of aerodynamic propulsion in which the vehicle emits a high-speed stream |
| reaction turbine | a turbine with blades arranged to develop torque from gradual decrease of steam pressure from inlet to exhaust |
| speed bump | a hindrance to speeding created by a crosswise ridge in the surface of a roadway |
speedometer
speed indicator | a meter fixed to a vehicle that measures and displays its speed |
speed skate
racing skate | an ice skate with a long blade, worn for racing |
speed
swiftness
fastness | a rate (usually rapid) at which something happens, the project advanced with gratifying speed |
| execution speed | (computer science) the speed with which a computational device can execute instructions, measured in MIPS |
Wassermann test
Wasserman reaction
Wassermann | a blood test to detect syphilis, a complement fixation test is used to detect antibodies to the syphilis organism treponema, a positive reaction indicates the presence of antibodies and therefore syphilis infection |
| speed trap | a trap arranged on a roadway for catching speeders |
third law of motion
Newton's third law of motion
Newton's third law
law of action and reaction | action and reaction are equal and opposite |
| reaction | an idea evoked by some experience, his reaction to the news was to start planning what to do |
| reaction | extreme conservatism in political or social matters, the forces of reaction carried the election |
| speed limit | regulation establishing the top speed permitted on a given road |
Irish National Liberation Army
INLA
People's Liberation Army
People's Republican Army
Catholic Reaction Force | a radical terrorist group dedicated to the removal of British forces from Northern Ireland and the unification of Ireland |
motorcycle cop
motorcycle policeman
speed cop | a policeman who rides a motorcycle (and who checks the speeds of motorists) |
speeder
speed demon | a driver who exceeds the safe speed limit |
| speed freak | addict who habitually uses stimulant drugs (especially amphetamines) |
speedskater
speed skater | an ice-skater who races competitively, usually around an oval course |
| reaction | a response that reveals a person's feelings or attitude, he was pleased by the audience's reaction to his performance, John feared his mother's reaction when she saw the broken lamp |
| reaction | (mechanics) the equal and opposite force that is produced when any force is applied to a body, every action has an equal and opposite reaction |
| reaction propulsion | propulsion that results from the ejection at high velocity of a mass of gas to which the vehicle reacts with an equal and opposite momentum |
| addition reaction | a chemical reaction in which one molecule is added to another |
| aldol reaction | a reaction of aldehydes resulting in an aldol |
| chain reaction | a series of chemical reactions in which the product of one is a reactant in the next |
| chain reaction | a self-sustaining nuclear reaction, a series of nuclear fissions in which neutrons released by splitting one atom leads to the splitting of others |
chemical reaction
reaction | (chemistry) a process in which one or more substances are changed into others, there was a chemical reaction of the lime with the ground water |
decomposition decomposition reaction
chemical decomposition reaction | (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance |
defense mechanism
defense reaction
defence mechanism
defence reaction
defense
defence | (psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires |
| displacement displacement reaction | (chemistry) a reaction in which an elementary substance displaces and sets free a constituent element from a compound |
double decomposition
double decomposition reaction
metathesis | a chemical reaction between two compounds in which parts of each are interchanged to form two new compounds (ABCDADCB) |
| double replacement reaction | a chemical reaction between two compounds where the positive ion of one compound is exchanged with the positive ion of another compound |
| elimination reaction | a chemical reaction in which a molecule decomposes to two different molecules |
| endoergic reaction | a nuclear reaction occurring with absorption of energy |
| endothermic reaction | a chemical reaction accompanied by the absorption of heat |
| exoergic reaction | a nuclear reaction accompanied by the evolution of energy |
| exothermic reaction | a chemical reaction accompanied by the evolution of heat |
fusion
nuclear fusion
nuclear fusion reaction | a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy |