1. Adnexa - accessory or adjoining anatomical parts or appendages to an organ (especially of the embryo); "Fallopian tubes and ovaries are Adnexa of the uterus" annexa body part - any part of an organism such as an organ or extremity

2. Borrowed from Latin Adnexa, annexa, neuter plural of adnexus, annexus "attached, conjoined," from past participle of adnectere, annectere "to tie on, fasten, attach" — more at annex entry 1 Learn More about Adnexa Time Traveler for Adnexa The first known use of Adnexa …