ecological ectocrine

ec·o·log·i·cal ec·to·crine

a chemical substance that undergoes biosynthesis in one species and that exerts an effect on the function of another species through mechanisms of the external environment; for example, the biosynthesis of vitamins by ruminants and their subsequent ingestion by other animals.
See also: ectohormone.
Farlex Partner Medical Dictionary © Farlex 2012
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