Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Previous word: catalysis
Next word: catalyze
Definition of: catalyst
(kat′ə·list) noun Chem.
Any substance or agent that causes catalysis. A positive catalyst accelerates the speed of the reaction; a negative catalyst retards it.
Comment about this word, ask questions, or add new information about this topic: