Du'plex, a.

a. [Lat., from duo, two, and plicare, to fold.] Double; twofold.

Duplex querela (Eccl. Law.) See DOUBLE QUARREL.—Duplex ratio (Math.), the product of a ratio.—Duplex escapement, a peculiar kind of watch escapement, in which, the escape wheel having two sets of teeth, a double action takes place at each vibration of the balance.—Duplex watch, one with a duplex escapement.—Duplex lathe, one which works with two turning tools at once.