Search Result：contact action
contact action 
(TTS Sound)
(TTS Sound)Overview of noun contact_action
The noun contact action has 1 sense
- catalysis, contact action -- (acceleration of a chemical reaction induced the presence of material that is chemically unchanged at the end of the reaction; "of the top 50 commodity chemicals, 30 are created directly by catalysis and another 6 are made from raw materials that are catalytically produced")