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Related to autacoidal: autacoid substance
au·ta·coidalso au·to·coid (ô′tə-koid′)
An organic substance, such as a hormone, produced in one part of an organism and transported by the blood, lymph, or sap to another part of the organism where it exerts a physiologic effect on that part.
au′ta·coi′dal (-koid′l) adj.