单词：dyarchy 

名词

• 
  [1.n.dyarchy] (同义词:[diarchy( n. 两头政治, 两头政权(亦作dyarchy) )]  [dyarchy( n. 两头政治 )]  )
• 
  注释列句：a form of government having two joint rulers
• 上位词 -> [political_system]  [social_group]  [group( n. 团体, 组, 团, 群, 批, [地]界, [化]基 v. 聚合, 成群 )]  [abstraction( n. 提取 )]  [entity( n. 实体 )]