English > reaction: 7 senses > noun 1, process| Meaning | (chemistry) a process in which one or more substances are changed into others. |
|---|
| Example | "there was a chemical reaction of the lime with the ground water" |
|---|
| Synonym | chemical reaction |
|---|
| Category | chemistry, chemical science | The science of matter |
|---|
| Narrower | 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 |
| chemical equilibrium, equilibrium | A chemical reaction and its reverse proceed at equal rates |
| 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 |
| 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 (AB+CD=AD+CB) |
| elimination reaction | A chemical reaction in which a molecule decomposes to two different molecules |
| endothermic reaction | A chemical reaction accompanied by the absorption of heat |
| exothermic reaction | A chemical reaction accompanied by the evolution of heat |
| hydrolysis | A chemical reaction in which water reacts with a compound to produce other compounds |
| neutralization, neutralisation, neutralization reaction, neutralisation reaction | A chemical reaction in which an acid and a base interact with the formation of a salt |
| oxidation, oxidization, oxidisation | The process of oxidizing |
| oxidation-reduction, oxidoreduction, redox | A reversible chemical reaction in which one reaction is an oxidation and the reverse is a reduction |
| photochemical reaction | A chemical reaction produced by the action of light |
| reduction, reducing | Any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen) |
| saponification | A chemical reaction in which an ester is heated with an alkali (especially the alkaline hydrolysis of a fat or oil to make soap) |
| Broader | chemical process, chemical change, chemical action | (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved |
|---|
| Spanish | reacción, reacción química |
|---|
| Catalan | reacció, reacció química |
|---|
| Verbs | react | undergo a chemical reaction |
|---|
English > reaction: 7 senses > noun 3, act| Meaning | A bodily process occurring due to the effect of some antecedent stimulus or agent. |
|---|
| Example | "a bad reaction to the medicine" |
|---|
| Synonym | response |
|---|
| Narrower | answer | A nonverbal reaction |
|---|
| automatism | Any reaction that occurs automatically without conscious thought or reflection (especially the undirected behavior seen in psychomotor epilepsy) |
| double take | A delayed reaction indicating surprise |
| galvanic skin response, GSR, psychogalvanic response, electrodermal response, electrical skin response, Fere phenomenon, Tarchanoff phenomenon | A change in the electrical properties of the skin in response to stress or anxiety |
| immune response, immune reaction, immunologic response | A bodily / bodily defense reaction that recognizes an invading substance (an antigen |
| kinesis | A movement that is a response to a stimulus but is not oriented with respect to the source of stimulation |
| learned reaction, learned response | A reaction that has been acquired by learning |
| overreaction | An excessive reaction |
| passage, passing | A bodily reaction of changing from one place or stage to another |
| rebound | A reaction to a crisis or setback or frustration |
| reflex, reflex response, reflex action, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reaction | An automatic instinctive unlearned reaction to a stimulus |
| taxis | A locomotor response toward or away from an external stimulus by a motile (and usually simple) organism |
| transfusion reaction | reaction of the body to a transfusion of blood that is not compatible with its own blood |
| tropism | An involuntary orienting response |
| Broader | bodily process, body process, bodily function, activity | An organic process that takes place in the body |
|---|
| Spanish | reacción, respuesta |
|---|
| Catalan | reacció, resposta |
|---|
| Adjectives | psychomotor | of or relating to or characterizing mental events that have motor consequences or vice versa |
|---|
| sensorimotor | of or relating to the sensory and motor coordination of an organism or to the controlling nerves |
| Verbs | react | show a response or a reaction to something |
|---|
