*didym*

n. [ NL., fr. Gr. &unr_; twin. ] (Chem.) A rare metallic substance usually associated with the metal cerium; -- hence its name. It was formerly supposed to be an element, but has since been found to consist of two simpler elementary substances, neodymium and praseodymium. See Neodymium, and Praseodymium. [ 1913 Webster ]

a. [ Gr. di`dymos twofold, twin. ] (Bot.) Growing in pairs or twins. [ 1913 Webster ]

‖n. [ NL., fr. Gr. &unr_;; 'epi` upon + &unr_; testicle. ] (Anat.) An oblong vermiform mass on the dorsal side of the testicle, composed of numerous convolutions of the excretory duct of that organ. -- Ep`i*did"y*mal a. [1913 Webster]

‖n. [ NL. See Epididymis, and -itis. ] (Med.) Inflammation of the epididymis, one of the common results of gonorrhea. [ 1913 Webster ]