Definition: The term "tropistic" is a technical term used in the field of control theory and engineering, specifically related to systems with multiple inputs and outputs. It refers to a system where the response of one input depends on the responses of other inputs and vice versa. In simple terms, a tropistic system is a system that consists of two or more subsystems, each of which is affected by the behavior of the others. The system's output is determined by the behavior of these subsystems'