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The outside or superficial portions of a body; the surface.

The hollow globe or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum.

A turning or sliding piece which, by the shape of its periphery or face, or a groove in its surface, imparts variable or intermittent motion to, or receives such motion from, a rod, lever, or block brought into sliding or rolling contact with it.

A filter, as for sugar, in which a cylinder with a porous or foraminous periphery is rapidly rotated so as to drive off liquid by centrifugal action.

hich the standing rigging is fastened. -- Chain pulley, a pulley with depressions in the periphery of its wheel, or projections from it, made to fit the links of a chain. -- Chain pumps. See in the Vocabulary. -- Chain rule (Arith.), a theorem for solving numerical problems by composition of ratios, or compound prop…

The line that goes round or encompasses a circular figure; a periphery. Millon.

The exterior line which determines the form or magnitude of a body; outline; periphery. Ray.

figure or body, or the line or lines representing such an outline; the line that bounds; periphery. Titian's coloring and contours. A. Drummond.

An imaginary circle surrounding the earth, in whose periphery either the heavenly body or the center of the heavenly body's epicycle was supposed to be carried round.

or the purpose of driving several pulleys, by means of belts or straps passing around its periphery; also, the barrel of a hoisting machine, on which the rope or chain is wound.

ng straight-line motion from circular motion, on the principle that a pin fastened in the periphery of a gear wheel will describe a straight line when the wheel rolls around inside a fixed internal gear of twice its diameter.

Going barrel. (Horology) (a) A barrel containing the mainspring, and having teeth on its periphery to drive the train. (b) A device for maintaining a force to drive the train while the timepiece is being wound up. -- Going forth. (Script.) (a) Outlet; way of exit. "Every going forth of the sanctuary." Ezek. xliv. 5.…

A screw cut on a solid whose sides are arcs of the periphery of a wheel into the teeth of which the screw is intended to work. It is named from the person who first used the form.

on between stars by observations of the times at which the stars cross the inner or outer periphery of the ring. -- Double image micrometer, a micrometer in which two images of an object are formed in the field, usually by the two halves of a bisected lens which are movable along their line of section by a screw, and…

o. Addison. Mutilated gear, Mutilated wheel (Mach.), a gear wheel from a portion of whose periphery the cogs are omitted. It is used for giving intermittent movements.

exhibiting the successive phases of a scene, are printed on paper and mounted around the periphery of a wheel. The rotation of the wheel brings them rapidly into sight, one after another, and the blended effect gives a semblance of motion.

that line as an axis. -- Parabolic spiral, a spiral curve conceived to be formed by the periphery of a semiparabola when its axis is wrapped about a circle; also, any other spiral curve having an analogy to the parabola.

Of or pertaining to a periphery; constituting a periphery; peripheric.

ks, newspaper, handbills, etc. -- Printing wheel, a wheel with letters or figures on its periphery, used in machines for paging or numbering, or in ticket-printing machines, typewriters, etc.; a type wheel.

A right line drawn or extending from the center of a circle to the periphery; the semidiameter of a circle or sphere.