- noun a substance that increases the activity of a catalyst
- noun a gene that controls the expression of structural genes.
Cars & Driving
- noun a substance embedded in the washcoat on catalyst substrates that serves to enhance catalytic efficiency
- noun somebody who introduces a new Bill into parliament
- noun a person who introduces a new bill into Parliament
- noun somebody who tries to make an athlete more widely known or more successful, e.g. to secure sponsorship deals