pheromone

A chemical secreted by an animal, especially an insect, that influences the behavior or physiology of others of the same species, as by attracting members of the opposite sex or marking the route to a food source.

A chemical secreted by an animal, especially an insect that affects the development or behavior of other members of the same species, functioning often as a means of attracting a member of the opposite sex.

a chemical substance secreted externally by some animals (especially insects) that influences the physiology or behavior of other animals of the same species