n. [ Proto- + Gr. 'agw`n a contest. See. Protagonist. So called because it was the first definitely ascertained principle of the brain. ] (Physiol. Chem.) A nitrogenous phosphorized principle found in brain tissue. By decomposition it yields neurine, fatty acids, and other bodies. [ 1913 Webster ]
n. [ Gr. prwtagonisth`s; prw^tos first + 'agonisth`s an actor, combatant, fr. 'agw`n a contest. ] One who takes the leading part in a drama; hence, one who takes lead in some great scene, enterprise, conflict, or the like. [ 1913 Webster ]
Shakespeare, the protagonist on the great of modern poetry. De Quincey. [ 1913 Webster ]
(n) a person who backs a politician or a team etc., Syn. champion, booster, protagonist, admirer, friend, Example:all their supporters came out for the game; they are friends of the library
[して, shite] (n) (1) doer; performer; (2) (uk) protagonist (in noh or kyogen); hero; leading part; main character; (3) (仕手 only) speculator (in trading); (P)