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pe) In the direction from which stars are apparently moving (in consequence of the erth's rotation); as, a small star, north following or south following. In the direction toward which stars appear to move is called preceding.

itous selection; hazard. [R.] No mode of election operating in the spirit of fortition or rotation can be generally good. Burke.

r hub of a cycle, which engages the rear sprocket with the rear wheel when the pedals are rotated forwards, but permits the rear wheel to run on free from the rear sprocket when the pedals are stopped or rotated backwards. Freewheelcycles are usually fitted with hub brakes or rim brakes, operated by back pedaling.…

t forcibly into the corresponding hollow cone b on the other shaft, compels the shafts to rotate together, by the hold the friction of the conical surfaces gives. (b) A toothed clutch, one member of which, instead of being made fast on its shaft, is held by friction and can turn, by slipping, under excessive strain or…

A rotatory cylinder, covered with wire teeth or teasels, for teaseling woolen cloth. Gig machine, Gigging machine, Gig mill, or Napping machine. See Gig, 4. -- Gig saw. See Jig saw.

ed to a curve that slips continuously on another fixed curve, the movable curve having no rotation at any instant.

Glutaric acid, an organic acid obtained as a white crystalline substance, isomeric with pyrotartaric acid; -- called also normal pyrotartaric acid.

One who, or that which, grooms horses; especially, a brush rotated by a flexible or jointed revolving shaft, for cleaning horses.

or whirling, as around a fixed center; a circular or spiral motion; motion about an axis; rotation; revolution. The gyrations of an ascending balloon. De Quincey. If a burning coal be nimbly moved round in a circle, with gyrations continually repeated, the whole circle will appear like fire. Sir I. Newton.…

A rotating wheel, mounted in a ring or rings, for illustrating the dynamics of rotating bodies, the composition of rotations, etc. It was devised by Professor W. R. Johnson, in 1832, by whom it was called the rotascope.

hin flange of metal for supporting the instrument. It is used in studying the dynamics of rotating bodies.

The doctrine or theory of the gyrostat, or of the phenomena of rotating bodies.

isalana, of Mexico and Yucatan. -- Sunn hemp, a fiber obtained from a leguminous plant (Crotalaria juncea). -- Water hemp, an annual American weed (Acnida cannabina), related to the amaranth.

Similarly in arrangement of parts; -- the opposite of heterotaxy.

water siluroid fish; the bullpout. -- Horned rattler (Zoöl.), a species of rattlesnake (Crotalus cerastes), inhabiting the dry, sandy plains, from California to Mexico. It has a pair of triangular horns between the eyes; -- called also sidewinder. -- Horned ray (Zoöl.), the sea devil. -- Horned screamer (Zoöl.), the…

rent motor comprising two wound members, one stationary, called the stator, and the other rotating, called the rotor, these two members corresponding to a certain extent to the field and armature of a direct-current motor.

g a given instant; as, instantaneous acceleration, velocity, etc. Instantaneous center of rotation (Kinematics), in a plane or in a plane figure which has motions both of translation and of rotation in the plane, is the point which for the instant is at rest. -- Instantaneous axis of rotation (Kinematics), in a body w…

to use for catch crops at seasons when the ground is not covered by crops of the regular rotation.

To make, or tend to make (the motion of a moving body), uniform in rate of rotation, or in frequency of vibration.

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.