a. [ L. ancillaris, fr. ancilla a female servant. ] Subservient or subordinate, like a handmaid; auxiliary. [ 1913 Webster ]
The Convocation of York seems to have been always considered as inferior, and even ancillary, to the greater province. Hallam. [ 1913 Webster ]
. (Law) An administration subordinate to, and in aid of, the primary or principal administration of an estate. [ Webster 1913 Suppl. ]