noun Date: 14th century one that promotes, prosecutor , a substance that in very small amounts is able to increase the activity of a catalyst, a binding site in a DNA chain at which RNA polymerase binds to initiate transcription of messenger RNA by one or more nearby structural genes
PROMOTER
Meaning of PROMOTER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012