The spelling of "epidimy" is incorrect. The correct spelling is "epididymis" (/ˌɛpəˈdɪdɪmɪs/), which refers to a tightly coiled tube located behind the testicles. The word is derived from the Greek word "epididymos", which means "upon the twin." The proper spelling of this word is important in medical fields, as the epididymis is a crucial part of the male reproductive system. Pronouncing the word correctly includes emphasizing the second syllable and pronouncing the "i" as a short "i" sound.