term:

Surrogate

surrogate 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