Definition of retardation in English:
 retardation
noun riːtɑːˈdeɪʃ(ə)nˌriˌtɑrˈdeɪʃ(ə)n
mass nounThe action of delaying or slowing the progress or development of something.
 the goals of treatment include retardation of disease progression
 Example sentencesExamples
-  Fetuses and children exposed to incinerator dioxins suffered liver damage and retardation of sexual and brain development.
 -  He appeared to have some psychomotor retardation with minimal eye contact.
 -  He explained that he used the word 'normal' only in the context of a concern for growth retardation.
 -  Animals receiving heavy doses of alcohol showed retardation of hepatic repair.
 -  Under heavy braking, the gearbox changes down flawlessly, giving increased retardation.
 -  The retardation of proton escape from the membrane surface was previously explained by the damping effect of immobile pH buffer at the surface.
 -  This is a consequence of the considerable retardation of plasma flow through the layer over this range.
 -  Congenital retardation seems to doom many of the individual's interests to frustration.
 -  The retardation of ribcage growth may effectively set the limit of functional compensation that can be achieved.
 -  There is nothing here to suggest retardation of this normal sequence of events.
 
  Definition of retardation in US English:
 retardation
nounˌrēˌtärˈdāSH(ə)nˌriˌtɑrˈdeɪʃ(ə)n
The action of delaying or slowing the progress or development of something.
 the goals of treatment include retardation of disease progression
 Example sentencesExamples
-  The retardation of ribcage growth may effectively set the limit of functional compensation that can be achieved.
 -  Congenital retardation seems to doom many of the individual's interests to frustration.
 -  This is a consequence of the considerable retardation of plasma flow through the layer over this range.
 -  He appeared to have some psychomotor retardation with minimal eye contact.
 -  Under heavy braking, the gearbox changes down flawlessly, giving increased retardation.
 -  There is nothing here to suggest retardation of this normal sequence of events.
 -  Fetuses and children exposed to incinerator dioxins suffered liver damage and retardation of sexual and brain development.
 -  He explained that he used the word 'normal' only in the context of a concern for growth retardation.
 -  Animals receiving heavy doses of alcohol showed retardation of hepatic repair.
 -  The retardation of proton escape from the membrane surface was previously explained by the damping effect of immobile pH buffer at the surface.