Enhancer (noun)

1. A substance or agent that increases or improves the effectiveness or potency of something else.
2. A genetic element that increases the expression of a gene or genes located nearby.

Origin:

From the english word "enhance" which comes from the latin word enhancia, which means "to make higher".

Examples:

1. The enhancer drug was used to improve the effectiveness of the chemotherapy.
2. A flavor enhancer is a substance added to food to enhance its taste.
3. Some enhancer elements are found in the non-coding regions of the genome and are called cis-regulatory elements.
4. The enhancer element can modulate the activity of a gene by increasing or decreasing its expression.
5. The enhancer element can be specific for a particular cell type or tissue.