surrogate
/ˈsʌrəgɪt/noun
1- a substitute, especially a person deputizing for another in a specific role or office代理人; 替代者：
wives of MPs are looked on as surrogates for their husbands while the latter are at Westminster.
当议员们在威斯敏斯特时, 他们的夫人被看做其丈夫的代理人。
1.1
- (in the Christian Church) a bishop's deputy who grants marriage licences（基督教）（签发结婚证书的）主教代理人。
1.2
- (in the US) a judge in charge of probate, inheritance, and guardianship（美国）（掌管遗嘱、遗产、监护事宜的）遗嘱检验法官。
词源
early 17th cent.: from Latin surrogatus, past participle of surrogare 'elect as a substitute', from super- 'over' + rogare 'ask'.