sur·ro·gate /'sər-ə-gət/ n [Latin surrogatus, past participle of surrogare subrogare to substitute, from sub- in place of, under + rogare to ask]
1: one acting in the place of another; esp: one standing in loco parentis to a child
2 often cap: the judge or judicial officer of a Surrogate's Court or Surrogate's office
surrogate adj
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.