Search the Dictionary

To act or perform a second time; to do over again; as, to react a play; the same scenes were reacted at Rome.

e or diminish the current, or the similar influence of a condenser; inductive resistance. Reactance is measured in ohms. The reactance of a circuit is equal to the component of the impressed electro-motive force at right angles to the current divided by the current, that is, the component of the impedance due to the se…

A choking coil.

production of new compounds or the manifestation of distinctive characters. See Blowpipe reaction, Flame reaction, under Blowpipe, and Flame.

Being, causing, or favoring reaction; as, reactionary movements.

A reactionary. C. Kingsley.

Having power to react; tending to reaction; of the nature of reaction. -- Re*act"ive*ly, adv. -- Re*act"ive*ness, n.

A choking coil.

See Catharsis, below.

To act beforehand; to perform previously.

Previous action.

A test for typhoid fever based on the fact that blood serum of one affected, in a bouillon culture of typhoid bacilli, causes the bacilli to agglutinate and lose their motility.

Of or pertaining to an acid; as, acid reaction.

rocess based on the law of chemical combinations, or the fact that, to produce a complete reaction, a certain definite weight of reagent is required. -- Ac`id*i*met"ric*al, a.

hyde: CH3CHO + CH3CHO = H3CH(OH)CH2CO; also, any of various derivatives of this. The same reaction has been applied, under the name of aldol condensation, to the production of many compounds.

alkalies. -- Alkaline metals, potassium, sodium, cæsium, lithium, rubidium. -- Alkaline reaction, a reaction indicating alkalinity, as by the action on limits, turmeric, etc.

Opposition by which the quality opposed asquires strength; resistance or reaction roused by opposition or by the action of an opposite principle or quality.

ulin, contained in oat kernels, very similar in composition to excelsin, but different in reactions and crystalline form.

A machine, invented in the 17th century, worked by a form of reaction wheel. The water flows into a vertical tube and gushes from apertures in hollow horizontal arms, causing the machine to revolve on its axis.

Apparently alkaline, as certain normal salts which exhibit alkaline reactions with test paper.