deferential (nerve) plexus

def·er·en·tial (nerve) plex·us

[TA] an autonomic plexus on the seminal vesicle and ampulla of the ductus deferens on each side, derived from the inferior hypogastric plexus. Synonym(s): plexus (nervosus) deferentialis [TA], plexus of ductus deferens