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Related to retarder: surface retarder, concrete retarder

re·tard 1

v. re·tard·ed, re·tard·ing, re·tards
To cause to move or proceed slowly; delay or impede.
To be delayed.
1. A slowing down or hindering of progress; a delay.
2. Music A slackening of tempo.

[Middle English retarden, from Old French retarder, from Latin retardāre : re-, re- + tardāre, to delay (from tardus, slow).]

re·tard′er n.

re·tard 2

n. Offensive Slang
1. Used as a disparaging term for a person with an intellectual disability.
2. A person considered to be foolish or socially inept.

[Short for retarded.]


1. a person or thing that retards
2. (Chemistry) a substance added to slow down the rate of a chemical change, such as one added to cement to delay its setting
References in periodicals archive ?
Featuring the latest Combination Control panel, the recently launched Williams modular range of dough retarder provers, the Crystal DRP cabinets offer a seven-day programming facility, a 'one-shot' button for single/repeat recovery cycles, a choice of automatic or manual selection and adjustable humidity levels with variable proving temperatures.
Retarder RSF is a non-staining and non-discoloring retarder for natural and synthetic rubber compounds.
For MBS a number of alternatives within the group of sulfenamides were proposed, eg., CBS or TBBS alone or, if necessary, with the addition of a retarder. Also, mixtures of CBS and DCBS could be a viable solution.
They are compared at equivalent peroxide levels taking into compensation the level of retarder present.