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A complex machine for planing wood, especially boards, containing usually a rapidly revolving cutter, which chips off the surface in small shavings as the piece to be planed is passed under it by feeding apparatus.

illar. -- Knight of the post. See under Knight. -- Post hanger (Mach.), a bearing for a revolving shaft, adapted to be fastened to a post. -- Post hole, a hole in the ground to set the foot of a post in. -- Post mill, a form of windmill so constructed that the whole fabric rests on a vertical axis firmly fastened t…

ioned in Matt. xxvii. 7. -- Potter's ore. See Alquifou. -- Potter's wheel, a horizontal revolving disk on which the clay is molded into form with the hands or tools. "My thoughts are whirled like a potter's wheel." Shak. Potter wasp (Zoöl.), a small solitary wasp (Eumenes fraternal) which constructs a globular nest o…

ss. Mark ii. 4. Cylinder press, a printing press in which the impression is produced by a revolving cylinder under which the form passes; also, one in which the form of type or plates is curved around a cylinder, instead of resting on a flat bed. Hydrostatic press. See under Hydrostatic. -- Liberty of the press, the f…

In the Ptolemaic system, the outermost of the revolving concentric spheres constituting the universe, the motion of which was supposed to carry with it all the inclosed spheres with their planets in a daily revolution from east to west. See Crystalline heavens, under Crystalline. The motions of the greatest persons in…

who supposed the earth to be fixed in the center of the universe, with the sun and stars revolving around it. This theory was received for ages, until superseded by the Copernican system.

l oven, a baker's oven in which bread pans hang suspended from the arms of a kind of reel revolving on a horizontal axis. Knight.

he barrel, and fired. (b) A form in which the charges are held in, and discharged from, a revolving chamber at the breech of the barrel. See Revolver, and Magazine gun, under Magazine. -- Repeating instruments (Astron. & Surv.), instruments for observing angles, as a circle, theodolite, etc., so constructed that the a…

Capable of revolving; rotatory; revolving. [Obs.] Us, then, to whom the thrice three year Hath filled his revoluble orb since our arrival here, I blame not. Chapman.

The act of revolving, or turning round on an axis or a center; the motion of a body round a fixed point or line; rotation; as, the revolution of a wheel, of a top, of the earth on its axis, etc.

Act of revolving. [R.]

The act or state of revolving; revolution. [Archaic] Its own revolvency upholds the world. Cowper.

course as the movement of the hands of a watch seen in front; -- said of the motion of a revolving object looked at from a given direction.

A shaft that oscillates on its journals, instead of revolving, -- usually carrying levers by means of which it receives and communicates reciprocating motion, as in the valve gear of some steam engines; -- called also rocker, rocking shaft, and way shaft.

One of a set of revolving cylinders, or rollers, between which metal is pressed, formed, or smoothed, as in a rolling mill; as, to pass rails through the rolls.

s, rails, etc. -- Rolling press. (a) A machine for calendering cloth by pressure between revolving rollers. (b) A printing press with a roller, used in copperplate printing. -- Rolling stock, or Rolling plant, the locomotives and vehicles of a railway. -- Rolling tackle (Naut.), tackle used to steady the yards when…

cating buckets or pistons. -- Rotary shears, shears, as for cloth, metal, etc., in which revolving sharp-edged or sharp-cornered wheels do the cutting. -- Rotary valve, a valve acting by continuous or partial rotation, as in the four-way cock.

as a wheel or a solid body on its axis, as distinguished from the progressive motion of a revolving round another body or a distant point; thus, the daily turning of the earth on its axis is a rotation; its annual motion round the sun is a revolution.

A revolving reverberatory furnace.

f vibrating cilia on the head, which, when in motion, often give an appearance of rapidly revolving wheels. The species are very numerous in fresh waters, and are very diversified in form and habits.