agonist

漢語翻譯

n. 主動肌, 促效藥, 顯效藥, 主縮肌
【化】 興奮劑; 激動劑
【醫】 主動肌, 主縮肌(與拮抗肌對立); 顯效藥, 促效藥(與拮抗藥對立)

英文解釋：

名詞 agonist:

1. the principal character in a work of fiction
   同義詞：protagonist
2. someone involved in a contest or battle (as in an agon)
3. a muscle that contracts while another relaxes
4. (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction