Appendage \Ap*pend"age\, n.

1. Something appended to, or accompanying, a principal or greater thing, though not necessary to it, as a portico to a house.

Modesty is the appendage of sobriety. --Jer. Taylor.

2. (Biol.) A subordinate or subsidiary part or organ; an external organ or limb, esp. of the articulates.

Antenn[ae] and other appendages used for feeling. --Carpenter.

Syn: Addition; adjunct; concomitant.

Source: Webster's Revised Unabridged Dictionary (1913)