activation
- n stimulation of activity in an organism or chemical
- n the activity of causing to have energy and be active
- n making active and effective (as a bomb)
activation energy
- n the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur
activator
- n (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription