Term: field theory: (physics) a theory that explains a physical phenomenon in terms of a field and the manner in which it interacts with matter or with other fields
Broader: theory: a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena | Unrelated: large intestine: beginning with the cecum and ending with the rectum; includes the cecum and the colon and the rectum; extracts moisture from food residues which are later excreted as feces