Question

agonist
ag.o.nist  AHD[²g“…-n¹st]   DJ[6#g*n!st]  KK[6#g*n!st]
n.（名词）
1.One involved in a struggle or competition.
    竞争者；竞赛者：进行斗争或竞争的人
2.Physiology A contracting muscle that is resisted or counteracted by another muscle, the antagonist.
  【生理学】 主动肌；主缩肌：被抵抗肌抵制或阻碍的收缩肌
3.Biochemistry A substance that can combine with a nerve receptor to produce a reaction typical for that substance.
  【生物化学】 兴奋剂：能和神经末梢结合在一起对该物质产生作用的物质
ORIGIN
1.Late Latinag½nista [contender]
    后期拉丁语ag½nista [竞争者]
2.from Greekag½nist¶s
    源自 希腊语ag½nist¶s
3.fromag½n [contest] * see  agony
    源自ag½n [竞争] *参见agony