| Definition/Meaning | Word/Phrase |
|---|
| (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected |
accelerator
,
catalyst
|
| efficiency with which electromagnetic radiation produces a photochemical reaction plotted as a function of the wavelength of the radiation |
action spectrum
|
| energy that an atomic system must acquire before a process (such as an emission or reaction) can occur |
activation energy
,
energy of activation
|
| part of an enzyme or antibody where the chemical reaction occurs |
active site
|
| (chemistry) the capacity of a substance to take part in a chemical reaction |
activity
|
| chemical reaction in which one molecule is added to another |
addition reaction
|
| compound formed by an addition reaction |
adduct
|
| (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction |
agonist
|
| reaction of aldehydes resulting in an aldol |
aldol reaction
|
| eczema caused by an allergic reaction |
allergic eczema
|
| hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity |
allergic reaction
,
allergy
|
| rhinitis caused by an allergic reaction |
allergic rhinitis
|
| bodily reaction to irritants |
allergy
|
| biochemical indicator of the presence of carbohydrates in a solution; if carbohydrates are present a violet ring is formed by reaction with alpha-naphthol in the presence of sulfuric acid |
alpha-naphthol test
,
Molisch's test
,
Molisch reaction
,
Molisch test
|
| severe and rapid and sometimes fatal hypersensitivity reaction to a substance (especially a vaccine or penicillin or shellfish or insect venom) to which the organism has become sensitized by previous exposure |
anaphylactic shock
|
| hypersensitivity reaction to the ingestion or injection of a substance (a protein or drug) resulting from prior contact with a substance |
anaphylaxis
|
| compound formed from one or more other compounds in a reaction resulting in removal of water |
anhydride
|
| nonverbal reaction |
answer
|
| (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst |
anticatalyst
|
| energy released by a nuclear reaction |
atomic energy
,
nuclear energy
|
