The Collaborative International Dictionary of English v.0.48:

Parepididymis \Par*ep`i*did"y*mis\, n. [NL. See Para-, and
   Epididymis.] (Anat.)
   A small body containing convoluted tubules, situated near the
   epididymis in man and some other animals, and supposed to be
   a remnant of the anterior part of the Wolffian body.
   [1913 Webster]