1. The science of communications and control in animals: The study of biocybernetics involves information about the physiological performance of the mechanisms and central nervous system controls and of the interactions between organisms and mechanical or electronic systems.
2. The science of communication and control within a living being; especially, on a molecular basis: Biocybernetics includes the processes of how communications and controls occur within the bodies of living systems between different parts of the body and of the interactions between organisms and mechanical or electronic systems.