paradidymis /per′ədid″imis/ pl. paradidymides [Gk, para + epi, above, didymos, twin] , a rudimentary structure in the male, situated on the spermatic cord of the epididymis, that consists of vestigial remains of the caudal part of the embryonic mesonephric tubules. A similar vestigial structure, the paroophoron, is found in the female. Also called organ of Giraldés, parepididymis. See also appendix epididymidis.