retarder
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Related to retarder: surface retarder, concrete retarder
re·tard 1
(rĭ-tärd′)v. re·tard·ed, re·tard·ing, re·tards
v.tr.
To cause to move or proceed slowly; delay or impede.
v.intr.
To be delayed.
n.
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
(rē′tärd′)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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
retarder
(rɪˈtɑːdə)n
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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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