agonist

• 多义词：故事中的主角；竞赛的参加者；收缩的肌肉（主动肌）；或激活细胞受体的生化物质（激动剂）。

A noun with multiple meanings: the main character in a story; a participant in a contest; a contracting muscle; or a biochemical substance that activates a cellular receptor.

1. Principal character in fictionB2formalart

   The main character in a story, play, or other work of fiction, often driving the plot forward.

   主角

   • The agonist in the novel struggles against societal norms.
   • Shakespeare's Hamlet is a complex agonist.
   • The film's agonist undergoes a significant transformation.

   同义词heroheroineleadprotagonist

   反义词antagonist

2. Participant in a contestC1formal

   A person who takes part in a struggle, competition, or conflict, especially in ancient Greek contests.

   竞赛参与者

   • The agonists in the ancient games were highly trained athletes.
   • Each agonist fought fiercely for victory in the arena.
   • The debate featured two skilled agonists.

   同义词combatantcompetitorcontendercontestantparticipant

3. Contracting muscleC1formalmedical

   A muscle that contracts to produce a specific movement, while the opposing muscle relaxes.

   主动肌

   • The biceps brachii acts as an agonist during elbow flexion.
   • Physical therapy focuses on strengthening the agonist muscle.
   • The agonist and antagonist work together for smooth motion.

   同义词prime moverprotagonist

   反义词antagonist

4. Biochemical agentC1formalmedical

   A substance, such as a drug, that binds to a receptor and triggers a physiological response in the body.

   激动剂

   • This drug acts as a dopamine agonist in the brain.
   • The agonist stimulates the receptor to produce a therapeutic effect.
   • Researchers are developing a new agonist for pain relief.

   同义词activatormimetic

   反义词antagonist