retarder: Meaning and Definition of
re•tard•er
Pronunciation: (ri-tär'dur), [key] — n.
- a person or thing that retards.
-
- any substance added to rubber to delay or prevent vulcanization.
- any substance added to delay a process.
- an admixture of concrete or plaster that retards its set.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.