'auxiliary' definitions:

Definition of 'auxiliary'

From: WordNet
adjective
Functioning in a supporting capacity; "the main library and its auxiliary branches" [syn: auxiliary, subsidiary, supplemental, supplementary]
adjective
Furnishing added support; "an ancillary pump"; "an adjuvant discipline to forms of mysticism"; "The mind and emotions are auxiliary to each other" [syn: accessory, adjunct, ancillary, adjuvant, appurtenant, auxiliary]
noun
Someone who acts as assistant [syn: aide, auxiliary]