1. A change in composition effected on a body by the mere presence of another which does not undergo any.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• catalysing,
• catalists,
• catalysist,
• catalyse,
• catalys,
• catarsis,
• catalysit,
• catalysed,
• cataklysis,
• cyotlysis,
• caryolysis,
• catclysmist,
• cataleppsis,
• catallexis,
• bazilysis,
• baslysis,
• cantolysis,
• catabasil,
• catalyysin,
• coralysis

• cattleship,
• catalase,
• catalog,
• Catalyse,
• catalexis,
• catwalk,
• catalyze,
• catalyst.

The adjective form of the word "catalysis" is "catalytic".

The plural of the "catalysis" can be the "catalyses".

The singular of the "catalysis" can be the "catalysis".