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its axis; pertaining to, or resembling, the motion of a wheel on its axis; rotatory; as, rotary motion. Rotary engine, steam engine in which the continuous rotation of the shaft is produced by the direct action of the steam upon rotating devices which serve as pistons, instead of being derived from a reciprocating mot…

turning, rolling, or whirling round.

See Dextrotatory.

wide, and half or three quarters of an inch thick. When thrown from the hand with a quick rotary motion, it describes very remarkable curves, according to the shape of the instrument and the manner of throwing it, often moving nearly horizontally a long distance, then curving upward to a considerable height, and finall…

hole or perforation with, or as with, a boring instrument; to cut a circular hole by the rotary motion of a tool; as, to bore for water or oil (i. e., to sink a well by boring for water or oil); to bore with a gimlet; to bore into a tree (as insects).

To roll or turn round; to cause to perform a rotary or circular motion. Ray.

In owls, the space around the eyes. Disk engine, a form of rotary steam engine. -- Disk shell (Zoöl.), any species of Discina.

achine for separating ore by the process of jigging. (b) (Metal Working) A machine with a rotary milling cutter and a templet by which the action of the cutter is guided or limited; -- used for forming the profile of an irregularly shaped piece; a profiling machine.

from the whey by evaporation and crystallization. It has a slightly sweet taste, is dextrorotary, and is much less soluble in water than either cane sugar or glucose. Formerly called lactin.

ection 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 lef…

rm by passing through a machine; specifically, to shape or dress, as metal, by means of a rotary cutter.

or 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 whi…

A combined rotary type-setting and printing machine for office use. The type is transferred semi-automatically by means of keys from a type-supply drum to a printing drum. The printing may be done by means of an inked ribbon to print "typewritten" letters, or directly from inked type or a stereotype plate, as in a prin…

A special form of rotary converter with stationary commutator and rotating brushes, in which the exciting field is induced by the alternating current in a short-circuited magnetic core instead of being produced by an external magnet.

, 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.

A gun, the inside of whose barrel is grooved with spiral channels, thus giving the ball a rotary motion and insuring greater accuracy of fire. As a military firearm it has superseded the musket.

Relating to wheels or to rotary motion; rotary. [R.]

turning, as a wheel; rotary; rotational. This high rotative velocity of the sun must cause an equatorial rise of the solar atmosphere. Siemens. Rotative engine, a steam engine in which the reciprocating motion of the piston is transformed into a continuous rotary motion, as by means of a connecting rod, a working beam…

that which gives a rotary or rolling motion, as a muscle which partially rotates or turns some part on its axis.

Turning as on an axis; rotary.