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retardation

noun

re·​tar·​da·​tion ˌrē-ˌtär-ˈdā-shən How to pronounce retardation (audio)
ri-
1
: an act or instance of retarding
2
: the extent to which something is retarded
3
: a musical suspension
specifically : one that resolves upward
4
a(1)
: an abnormal slowness of thought or action
psychomotor retardation
(2)
now usually offensive : intellectual disability
b
: slowness in development or progress
fetal growth retardation

Example Sentences

The child suffered severe mental retardation. The chemical induced a retardation of cell growth.
Recent Examples on the Web The Everrati's left pedal operates pads on discs in the normal fashion, but the motors also give powerful regenerative retardation when the accelerator is lifted. Mike Duff, Car and Driver, 18 June 2021 The Vantage’s brake pedal has a nice firm weight but little travel, retardation being down to pressure rather than movement. Mike Duff, Car and Driver, 28 Feb. 2018 The policy of retardation of submarine technology ended right after the beginning of the Anglo-German naval race (marked by the German Naval Laws of 1898 and 1900). chicagotribune.com, 28 July 2017 At the end Austen had psychomotor retardation and could barely move. Rene Chun, Los Angeles Magazine, 19 June 2017 The front wheels threaten to lock up under what feels like normal levels of retardation at low speeds. Mike Duff, Car and Driver, 30 June 2017

Word History

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of retardation was in the 15th century

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