Accessory \Ac*ces"so*ry\, n.; pl. Accessories.

1. That which belongs to something else deemed the principal; something additional and subordinate. ``The aspect and accessories of a den of banditti.'' --Carlyle.

2. (Law) Same as Accessary, n.

3. (Fine Arts) Anything that enters into a work of art without being indispensably necessary, as mere ornamental parts. --Elmes.

Syn: Abettor; accomplice; ally; coadjutor. See Abettor.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Accessory \Ac*ces"so*ry\ (#; 277), a. [L. accessorius. See Access, and cf. Accessary.]

Accompanying as a subordinate; aiding in a secondary way; additional; connected as an incident or subordinate to a principal; contributing or contributory; said of persons and things, and, when of persons, usually in a bad sense; as, he was accessory to the riot; accessory sounds in music.

Note: Ash accents the antepenult; and this is not only more regular, but preferable, on account of easiness of pronunciation. Most orho["e]pists place the accent on the first syllable.

Syn: Accompanying; contributory; auxiliary; subsidiary; subservient; additional; acceding.

Source: Webster's Revised Unabridged Dictionary (1913)