As nouns the difference between appendage and adnexa
is that appendage is an external body part that projects from the body while adnexa is (anatomy) the appendages of an organ.
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