ACCESSORY

(EXTRA) [noun] [C usually plural] - something added to a machine or to clothing which has a useful or decorative purposeShe wore a green wool suit with matching accessories (= shoes, hat, bag, etc.).Sunglasses are much more than a fashion accessory.Accessories for the top-of-the-range car include leather upholstery, a compact disc player, electric windows and a sunroof.(figurative) Our new laptop computer is the essential accessory for today's business executive.