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cata-
catabolism
catabolite
catachresis
cataclysm
cataclysmic variable
catacomb
catadromous
catafalque
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catalytic converter

cat·a·lyt·ic con·vert·er (plural cat·a·lyt·ic con·vert·ers)


noun 
Definition:
 
chamber making exhaust fumes less harmful: in the exhaust system of a motor vehicle, a chamber in which gases mix with air so that pollutants such as carbon monoxide can be oxidized. The chamber contains a platinum-iridium catalyst.

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