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
* Mental retardation, also known as
intellectual disability
Intellectual disability (ID), also known as general learning disability in the United Kingdom and formerly mental retardation, Rosa's Law, Pub. L. 111-256124 Stat. 2643(2010). is a generalized neurodevelopmental disorder characterized by signif ...
, a disorder characterized by significantly impaired cognitive functioning and deficits in adaptive behaviors
*
Psychomotor retardation, 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 process in an organism compared to its ancestors or other organisms. This leads to changes in the ...
, able to cause effects such as neoteny, retention by adults of traits previously seen only in the young
Physics and engineering
*
Retardation factor In chromatography, the retardation factor (''R'') is the fraction of an analyte in the mobile phase of a chromatographic system. In planar chromatography in particular, the retardation factor ''R''F is defined as the ratio of the distance traveled b ...
, in chromatography, the fraction of an analyte in the mobile phase of a chromatographic system
*
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 th ...
, in electrodynamics, electromagnetic potentials generated by time-varying electric current or charge distributions in the past
*
Retarded time
In electromagnetism, electromagnetic waves in vacuum travel at the speed of light ''c'', according to Maxwell's Equations. The retarded time is the time when the field began to propagate from the point where it was emitted to an observer. The term ...
, time when an electromagnetic field began to propagate from a point in a charge distribution to an observer
*
Retardation time
* Retardation, in telegraphy, a kind of distortion of signal pulses; see
law of squares
The law of squares is a theorem concerning transmission lines. It states that the Electric current, current injected into the line by a step in voltage reaches a maximum at a time proportional to the square of the distance down the line. The theo ...
Music
*
Retardation (music), a suspension that resolves upward instead of downward
*
"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 ...
*
Retard (pejorative)
In modern use, retard is a pejorative term either for someone with a mental disability or for someone who is considered stupid, slow to understand, or ineffective in some way. The adjective retarded is in the same way used for something very f ...
, a pejorative term for someone with a mental disability
See also
*
Retarder (disambiguation)
*
Get Retarded (disambiguation)
*
{{disambiguation