Search the Dictionary

A straight, horizontal mark placed over two or more members of a compound quantity, which are to be subjected to the same operation, as in the expression x2 + y2 - x + y.

uished from the invisible, or real, church, consisting of sanctified persons. -- Visible horizon. Same as Apparent horizon, under Apparent. -- Vis"i*ble*ness, n. -- Vis"i*bly, adv.

he arc which measures the least distance from the sun at which, when the sun is below the horizon, a star or planet emerging from his rays becomes visible. -- Beatific vision (Theol.), the immediate sight of God in heaven. -- Direct vision (Opt.), vision when the image of the object falls directly on the yellow spot…

A long notch with a horizontal edge, as in the top of a vertical plate or plank, through which water flows, -- used in measuring the quantity of flowing water.

A gambling or lottery device consisting of a wheel which is spun horizontally, articles or sums to which certain marks on its circumference point when it stops being distributed according to varying rules.

or stumps, set vertically in the ground, with one or two short rods, called bails, lying horizontally across the top.

A machine for raising weights, consisting of a horizontal cylinder or roller moving on its axis, and turned by a crank, lever, or similar means, so as to wind up a rope or chain attached to the weight. In vessels the windlass is often used instead of the capstan for raising the anchor. It is usually set upon the foreca…

wind, usually by the action of the wind upon oblique vanes or sails which radiate from a horizontal shaft. Chaucer.

by the stone in sharpening it. -- Wire fence, a fence consisting of posts with strained horizontal wires, wire netting, or other wirework, between. -- Wire gauge or gage. (a) A gauge for measuring the diameter of wire, thickness of sheet metal, etc., often consisting of a metal plate with a series of notches of vari…

ture. -- Word square, a series of words so arranged that they can be read vertically and horizontally with like results.

distances from the zenith, but on opposite sides of it. It turns both on a vertical and a horizontal axis, is provided with a graduated vertical semicircle, and a level for setting it to a given zenith distance, and with a micrometer for measuring the difference of the zenith distances of the two stars.…

any. It has from thirty to forty wires strung across a shallow sounding-board, which lies horizontally on a table before the performer, who uses both hands in playing on it.

e sky, of an elongated, triangular figure, lying near the ecliptic, its base being on the horizon, and its apex at varying altitudes. It is to be seen only in the evening, after twilight, and in the morning before dawn. It is supposed to be due to sunlight reflected from multitudes of meteoroids revolving about the sun…