accessory
1ac·ces·so·ry
adj \ik-ˈses-(ə-)rē, ak-\Definition of ACCESSORY
1
: aiding, contributing, or associated in a secondary way: as a : being or functioning as a vitamin <accessory food substances> b : associated in position or function with something (as an organ or lesion) usually of more importance <the testis and accessory male ducts and glands—B. T. Scheer>
2
: supernumerary <accessory spleens>
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