follow Dictionary.com

11 Trending Words of 2014

retardant

[ri-tahr-dnt] /rɪˈtɑr dnt/
noun, Chemistry
1.
any substance capable of reducing the speed of a given reaction.
adjective
2.
retarding or tending to retard (usually used in combination):
fire-retardant construction materials.
Origin
1635-1645
1635-45; retard + -ant
Related forms
retardance, retardancy, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for retardancy

retardant

/rɪˈtɑːdənt/
noun
1.
a substance that reduces the rate of a chemical reaction
adjective
2.
having a slowing effect
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for retardancy

retardant

adj.

1640s, from retard (v.) + -ant or from Latin retardantem (nominative retardans), present participle of retardare. From 1952 as a noun, "retardant substance."

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

Word of the Day

Difficulty index for retardant

Few English speakers likely know this word

Word Value for retardancy

0
0
Scrabble Words With Friends