vasa efferentia
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vasa ef·fer·en·tia | \ -ˌef-ə-ˈren-ch(ē-)ə 
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\Medical Definition of vasa efferentia
: the 12 to 20 ductules that lead from the rete testis to the vas deferens and except near their commencement are greatly convoluted and form the compact head of the epididymis
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