LEFT-HANDED a.
ction contrary to that of the hands of a watch when seen in front; -- said of a twist, a rotary motion, etc., looked at from a given direction. Left-handed marriage, a morganatic marriage. See Morganatic. -- Left-handed screw, a screw constructed to advance away from the observer, when turned, as in a nut, with a left…
MILLING n.
r intented edge upon coin, etc.; the process of dressing surfaces of various shapes with rotary cutters. See Mill. High milling, milling in which grain is reduced to flour by a succession of crackings, or of slight and partial crushings, alternately with sifting and sorting the product. -- Low milling, milling in whic…
RECIPROCATE v.
or gas engine, etc., in which the piston moves back and forth; -- in distinction from a rotary engine, in which the piston travels continuously in one direction in a circular path. -- Reciprocating motion (Mech.), motion alternately backward and forward, or up and down, as of a piston rod.