'accessory' definitions:

Definition of 'accessory'

From: WordNet
adjective
Aiding and abetting in a crime; "he was charged with being accessory to the crime" [syn: accessary, accessory]
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
Clothing that is worn or carried, but not part of your main clothing [syn: accessory, accoutrement, accouterment]
noun
A supplementary component that improves capability [syn: accessory, appurtenance, supplement, add-on]
noun
Someone who helps another person commit a crime [syn: accessory, accessary]

Synonyms of 'accessory'

From: Moby Thesaurus