Retardation is the act or result of
delaying; the extent to which anything is retarded or delayed; that which retards or delays.
Retardation or retarded or similar may refer to:
Medicine and biology
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Intellectual disability
Intellectual disability (ID), also known as general learning disability (in the United Kingdom), and formerly mental retardation (in the United States), Rosa's Law, Pub. L. 111-256124 Stat. 2643(2010).Archive is a generalized neurodevelopmental ...
, a disorder characterized by significantly impaired cognitive functioning and deficits in adaptive behaviours, was previously referred to as "mental retardation"—the term is no longer in use due to the
pejoration
A pejorative word, phrase, slur, or derogatory term is a word or grammatical form expressing a negative or disrespectful connotation, a low opinion, or a lack of respect toward someone or something. It is also used to express criticism, hostility ...
of the term "retardation" in this context
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Psychomotor retardation
Psychomotor retardation involves a slowing down of thought and a reduction of physical movements in an individual. It can cause a visible slowing of physical and emotional reactions, including speech and affect.
Psychomotor retardation is most ...
, a slowing-down of thought and a reduction of physical movements in an individual
* A form of
heterochrony
In evolutionary developmental biology, heterochrony is any genetically controlled difference in the timing, rate, or duration of a Developmental biology, developmental process in an organism compared to its ancestors or other organisms. This lea ...
, able to cause effects such as neoteny, retention by adults of traits previously seen only in the young
Physics and engineering
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Retardation factor, in chromatography, the fraction of an analyte in the mobile phase of a chromatographic system
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Retarded potential
In electrodynamics, the retarded potentials are the electromagnetic potentials for the electromagnetic field generated by time-varying electric current or charge distributions in the past. The fields propagate at the speed of light ''c'', so t ...
, in electrodynamics, electromagnetic potentials generated by time-varying electric current or charge distributions in the past
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Retarded time, time when an electromagnetic field began to propagate from a point in a charge distribution to an observer
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Retardation time
Retardation is the delayed response to an applied force or stress, which can be described as "delay of the elasticity".
Ideal elastic materials show an immediate deformation after applying a jump-like stress, and an immediate reformation aft ...
* Retardation, in telegraphy, a kind of distortion of signal pulses; see
law of squares
* Retardation, as opposed to
Acceleration
In mechanics, acceleration is the Rate (mathematics), rate of change of the velocity of an object with respect to time. Acceleration is one of several components of kinematics, the study of motion. Accelerations are Euclidean vector, vector ...
Music
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Retardation (music), a suspension that resolves upward instead of downward
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"Retarded" (song), a 1990 single by the band The Afghan Whigs
Other uses
* A process used in
proofing (baking technique)
In cooking, proofing (also called proving) is a step in the preparation of yeast bread and other baked goods in which the dough is allowed to rest and rise a final time before baking. During this rest period, yeast Fermentation in food processing ...
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Retard (pejorative), a pejorative term for someone with a mental disability
See also
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Retarder (disambiguation) Retarder may refer to:
* Retarder (album), ''Retarder'' (album), an album by The Unband
* Retarder (chemistry), a chemical agent that slows down a chemical reaction
* Retarder (mechanical engineering), a device for slowing down large trucks, lorrie ...
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Get Retarded (disambiguation)
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