duplex (dupleks)

[ ated. Four perfectly independent wires were practically cre- Each of these wires was also duplexed , G. B. Pre scott, Elect. Invent., p. 219. II. in trans . To transmit telegraphic me ages by the duplex system. duplicate (du'pli-kāt), v.; pret. and pp. dupli cated, ppr. duplicating. [L. duplicatus, pp. of duplicare, make double, duplex ( duplic- ), double, twofold: see duplex. Cf. double, v.] I. trans. 1. To double; repeat; produce a second (like the first); make a copy or copies of. Whereof perhaps one reason is, because there is shewn in this a duplicated power: a contrary stream of power running acro and thwart, in its effects in this. Good win, Works, III. 1. 558. IMG:content-0099.png:[blocks in formation] 2. In arith., the multiplication of a number by two.-3. A folding; a doubling; also, a fold: as, the duplication of a membrane.-4. In physiol., the act or proce of dividing into two by natural growth or spontaneous division.-5. In music, the proce or act of adding the upper or lower octaves or replicates to the tones of a melody or harmony. See double, n. and r.-6. In bot., same as chorisis.-7. In admiralty law, a pleading on the part of the defendant in reply to the replication. Benedict. [Rare.]-8. Eccles., the celebration of the ma or eucharist twice by the same priest on the same day. From the sixth century to the thirteenth, duplication was in many places not an unusual practice on a number of days. Since the fourteenth century it has been forbidden in the Roman Catholic Church except on Christmas day. In the medieval church in England it was allowed on Easter day also. The Greek Church does not permit duplication.Duplication formula, in math., a formula for obtain The Century Dictionary and Cyclopedia: Dictionary duplication which shall ing the sine, etc., of the double of an angle from the functions of the angle itself. - Problem of the duplication, or duplication of the cube, in math, the problem the solid contents of a given cube. The problem is equiv alent to finding the cube root of 2, which is neither rational nor rationally expre ible in terms of square roots of integers; consequently neither an exact numerical solution nor an exact construction with a rule and compa is po ible. Also called the Delian problem. There remain yet some other pages of Mr. Hobbes's dialogue, wherein he speaks of the duplication of the cube , and the quadrature of the circle. Boyle, Works, I. 234. The altar of Apollo at Athens was a square block, or cube, and to double it required the duplication of the cube, in doubted the duplication of the 8.