THEOREM n. 3 definitions
That which is considered and established as a principle; hence, sometimes, a rule. Not theories, but theorems (Coleridge. By the theorems, Which your polite and terser gallants practice, I re-refine the court, and civilize Their barbarous natures. Massinger.
THEORETIC; THEORETICAL a.
Pertaining to theory; depending on, or confined to, theory or speculation; speculative; terminating in theory or speculation: not practical; as, theoretical learning; theoretic sciences. -- The`o*ret"ic*al*ly, adv.