1a series of organisms each dependent on the next as a source of food.
informal a hierarchical system or structure within a particular sphere or group:a small paper toward the bottom of the journalistic food chain
2the series of processes by which food is grown or produced, sold, and eventually consumed:they have taken all reasonable steps to ensure that no contaminated products enter the food chain
food chain in other Oxford dictionaries
Definition of food chain in the US English dictionary
