An odorant or other substance secreted or released by an organism and affects other organisms.
EXTERNAL CHEMICAL MESSENGER (ECM): "A pheromone is an example of an external chemical messenger."
Cite this page: N., Sam M.S., "EXTERNAL CHEMICAL MESSENGER (ECM)," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/external-chemical-messenger-ecm/ (accessed July 1, 2022).
