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catabolism
catabolite
catachresis
cataclysm
cataclysmic variable
catacomb
catadromous
catafalque
Catalan
catalase
catalectic
catalepsy
catalexis
catalog
Cataloging in Publication
catalogue raisonné
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catalytic cracker

cat·a·lyt·ic crack·er (plural cat·a·lyt·ic crack·ers)


noun 
Definition:
 
oil-refining equipment: an oil-refinery device that breaks down large molecules from crude oil into smaller ones that are useful as fuel, using heat and a catalyst to lower the required temperature

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