English dictionary
retarder
/r/I/'t/A/rd/@/r/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
-
One who, or that which, retards.
Source: webster1913
-
Any of various devices, as a helix of flat metal strip, introduced into a boiler tube to increase the heating effect of the fire.
Source: webster1913