meliorant

Example:The addition of organic matter is an improver for poor quality soil.

Definition:A substance or method that enhances or improves something.

Example:The enhancer improved the alkalinity of the soil, making it more suitable for plants.

Definition:A substance that serves to enhance or make a product more effective.

Example:The augmenter in the medication enhanced its effectiveness in reducing fever.

Definition:A substance that increases or enlarges something naturally.