Catalysts [noun]
Definition of Catalysts:
something which incites activity
Sentence/Example of Catalysts:
Many of the compounds are identical in structure, undergo similar changes, and are acted upon by similar catalysts.
Enzymes conform to all of these properties of catalysts, and are commonly defined as the "catalysts of living matter."
Professor Ewart of Melbourne has published an impressive account of researches on oxidation by organic and inorganic catalysts.
Hurt would come to Barbara as it came to everyone, but hurt, work and struggling were some of the catalysts that fused a marriage.
The postal agent and telephone operator were two other information catalysts.
Incidentally, colloidal preparations are widely used as catalysts.