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reaction British & World English

Something done, felt, or thought in response to a situation or event

reaction English Thesaurus

his reaction had bewildered her

dark reaction British & World English

The cycle of reactions (the Calvin cycle) which occurs in the second phase of photosynthesis and does not require the presence of light. It involves the fixation of carbon dioxide and its reduction to carbohydrate and the dissociation of water, using chemical energy stored in ATP

reaction shot British & World English

(In a film or video recording) a portrayal of a person’s response to an event or to a statement made by another

reaction time British & World English

The length of time taken for a person or system to respond to a given stimulus or event

chain reaction British & World English

A chemical reaction or other process in which the products themselves promote or spread the reaction

cross-reaction British & World English

The reaction of an antibody with an antigen other than the one which gave rise to it

light reaction British & World English

The reaction of something, especially the iris of the eye, to different intensities of light

addition reaction British & World English

A reaction in which one molecule combines with another to form a larger molecule with no other products

chemical reaction British & World English

A process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction

nuclear reaction British & World English

A change in the identity or characteristics of an atomic nucleus that results when it is bombarded with an energetic particle, as in fission, fusion, or radioactive decay

reaction formation British & World English

The tendency of a repressed wish or feeling to be expressed at a conscious level in a contrasting form

Diels–Alder reaction British & World English

An addition reaction in which a conjugated diene reacts with a compound with a double or triple bond so as to form a six-membered ring

polymerase chain reaction British & World English

A method of making multiple copies of a DNA sequence, involving repeated reactions with a polymerase

metathesis reaction in metathesis British & World English

another term for double decomposition.

Wassermann test British & World English

A diagnostic test for syphilis using a specific antibody reaction (the Wassermann reaction) of the patient’s blood serum

condensation reaction in condensation British & World English

A reaction in which two molecules combine to form a larger molecule, producing a small molecule such as H2O as a by-product

the light reaction in light reaction British & World English

The reaction which occurs as the first phase of photosynthesis, in which energy in the form of light is absorbed and converted to chemical energy in the form of ATP

Wassermann reaction in Wassermann test British & World English

A diagnostic test for syphilis using a specific antibody reaction (the Wassermann reaction) of the patient’s blood serum