Appendage
Ap·pend·age
Appendage
n.
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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.
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A subordinate or subsidiary part or organ; an external organ or limb, esp. of the articulates. (Biol.)
Antennæ and other appendages used for feeling.