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retardant

 - 2 dictionary results

re⋅tard⋅ant

[ri-tahr-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:
1635–45; retard + -ant


re⋅tard⋅ance, re⋅tard⋅an⋅cy, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To retardant
re·tar·dant   (rĭ-tär'dnt)   
adj.  Acting or tending to retard. Often used in combination: flame-retardant pajamas for children; a fire-retardant security chest.
re·tar'dant n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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