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Definition of EPIDIDYMIS
: a system of ductules emerging posteriorly from the testis that holds sperm during maturation and that forms a tangled mass before uniting into a single coiled duct which is continuous with the vas deferens
New Latin, from Greek, from epi- + didymos testicle, twin, from dyo two — more at two
First Known Use: 1610
Medical Definition of EPIDIDYMIS
: a system of ductules that emerges posteriorly from the testis, holds sperm during maturation, and forms a tangled mass before uniting into a single coiled duct which comprises the highly convoluted body and tail of the system and is continuous with the vas deferens—see vasa efferentia