dup

a. Capable of being duped. [ 1913 Webster ]

v. t. [ imp. & p. p. Duped p. pr. & vb. n. Duping. ] [ Cf. F. duper, fr. dupe. See Dupe, n. ] To deceive; to trick; to mislead by imposing on one's credulity; to gull; as, dupe one by flattery. [ 1913 Webster ]

Ne'er have I duped him with base counterfeits. Coleridge. [ 1913 Webster ]

n. [ F., prob. from Prov. F. dupe, dube; of unknown origin; equiv. to F. huppe hoopoe, a foolish bird, easily caught. Cf. Armor. houpérik hoopoe, a man easily deceived. Cf. also Gull, Booby. ] One who has been deceived or who is easily deceived; a gull; as, the dupe of a schemer. [ 1913 Webster ]

n. One who dupes another. [ 1913 Webster ]

n. [ F. duperie, fr. duper. ] The act or practice of duping. [ R. ] [ 1913 Webster ]

n. [ F. doupion, It. doppione, fr. doppio double, L. duplus. See Double, and cf. Doubloon. ] A double cocoon, made by two silkworms. [ 1913 Webster ]

a. [ L. duplus. See Double. ] Double. [ 1913 Webster ]

Duple ratio (Math.), that in which the antecedent term is double the consequent, as of 2 to 1, 8 to 4, etc. [ 1913 Webster ]

‖a. [ L., fr. duo two + plicare to fold. See Two, and Complex. ] 1. Double; twofold. [ 1913 Webster ]

2. (Computers) organized so that data may be transmitted in two opposite directions over the same channel; -- of communications channels, such as data transfer lines between computers. [ PJC ]

Duplex escapement, a peculiar kind of watch escapement, in which the scape-wheel has two sets of teeth. See Escapement. --
Duplex lathe, one for turning off, screwing, and surfacing, by means of two cutting tools, on opposite sides of the piece operated upon. --
Duplex pumping engine, a steam pump in which two steam cylinders are placed side by side, one operating the valves of the other. --
Duplex querela [ L., double complaint ] (Eccl. Law), a complaint in the nature of an appeal from the ordinary to his immediate superior, as from a bishop to an archbishop. Mozley & W. --
Duplex telegraphy, a system of telegraphy for sending two messages over the same wire simultaneously. --
Duplex watch, one with a duplex escapement. --
half duplex (Computers) (a) arranged so that the information may be transmitted in both directions, but only in one direction at a time; -- of communications channels between computers; contrasted with full duplex(a). (b) arranged so that the information transmitted to the remote computer also appears on the local terminal; -- of communications channels between computers; contrasted with full duplex(b). --
full duplex, (Computers) (a) arranged so that the information may be transmitted in both directions simultaneously; -- of communications channels between computers; contrasted with half duplex(a). (b) arranged so that the information transmitted to the remote computer does not appear on the local terminal; -- of communications channels between computers; contrasted with half duplex(b). [ 1913 Webster ]