As nouns the difference between appendage and tailpiece
is that appendage is an external body part that projects from the body while tailpiece is an appendage or appendix.
appendage
English
Noun
(
en noun)
an external body part that projects from the body
a natural prolongation or projection from a part of any organism
a part that is joined to something larger
Synonyms
* extremity, member
* outgrowth, process
tailpiece
English
Noun
(
en noun)
An appendage or appendix
(music, lutherie) A triangular piece of metal or ebony to which the strings of a violin, guitar, etc. are attached at the lower end
(architecture) A short joist between a header and a wall