pheromone
From ZooTerms (Dictionary of Invertebrate Zoology)
pheromone (noun; Greek phero, bear; hormao, to instigate): A chemical substance secreted by an animal on the substratum, on the bodies or possibly in the air, that influences the behavior of other individuals of the same or different species, such as trail-marking or following, alarm, dispersants, territorality, synchronization, aggregation and sex attractants.
