Noun
attractant (plural attractants)
Anything that attracts, but especially a substance (such as a pheromone) that attracts insects or other animals
However, the MCPs no longer respond to the attractant when they are fully methylated. Source: Internet
Therefore, when moving in a favorable direction, the concentration of the chemical attractant increases and "tumbles" are continually suppressed; however, when the cell's direction of motion is unfavorable (e. Source: Internet
In this way, it finds the location with the highest concentration of attractant (usually the source) quite well. Source: Internet