n. [ Gr. &unr_; double + &unr_; image + -scope. ] (Astron.) An instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass disposed in the form of a prism, so that, by the reflections of the sun's rays from their surfaces, two images are presented to the eye, moving in opposite directions, and coinciding at the instant the sun's center is on the meridian. [ 1913 Webster ]
a. [ Pref. di- + -plex, as in duplex. ] (Teleg.) Pertaining to the sending of two messages in the same direction at the same time. Diplex and contraplex are the two varieties of duplex. [ Webster 1913 Suppl. ]
‖n.; pl.Diplococci [ NL., fr. Gr. diplo`os twofold + ko`kkos grain, seed. ] (Biol.) A form of micrococcus in which cocci are united in a binary manner. See Micrococcus. [ 1913 Webster ]
‖n. [ NL., fr. Gr. &unr_; fold, fr. &unr_; twofold, double. ] (Anat.) The soft, spongy, or cancellated substance between the plates of the skull. [ 1913 Webster ]
n. [ Gr. &unr_; double + -graph. ] An instrument used for double writing, as one for producing embossed writing for the blind and ordinary writing at the same time. -- Dip`lo*graph"ic*al a. -- Dip*log"ra*phy n. [ Webster 1913 Suppl. ]
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