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rehead. Corrugated iron, sheet iron bent into a series of alternate ridges and grooves in parallel lines, giving it greater stiffness. -- Corrugated paper, a thick, coarse paper corrugated in order to give it elasticity. It is used as a wrapping material for fragile articles, as bottles.

A low outwork before a bastion or ravelin, consisting of two lines of rampart parallel to the faces of the bastion, and protecting them from a breaching fire.

s, movements, etc., which are equal in amount but opposite in direction, and acting along parallel lines or around parallel axes.

An implement consisting of a broad scythe for cutting grain, with a set of long fingers parallel to the scythe, designed to receive the grain, and to lay it eventlyin a swath.

opping crease (Cricket),, a line drawn in front of the wicket, four feet distant from it, parallel to the bowling crease and at least as long as the latter. J. H. Walsh (Encyc. of Rural Sports).

Not parallel; lying or falling athwart; transverse; oblique; intersecting. The cross refraction of the second prism. Sir I. Newton.

block attached to it and carrying a knuckle pin; as the solid crosspiece running between parallel slides, which receives motion from the piston of a steam engine and imparts it to the connecting rod, which is hinged to the crosshead.

A solid body which may be generated by the rotation of a parallelogram round one its sides; or a body of rollerlike form, of which the longitudinal section is oblong, and the cross section is circular.

described by a straight line that moves according to any law, but so as to be constantly parallel to a given line. -- Cylindrical vault. (Arch.) See under Vault, n.

a descending line, or plane, with a horizontal plane. -- Circle of declination, a circle parallel to the celestial equator. -- Declination compass (Physics), a compass arranged for finding the declination of the magnetic needle. -- Declination of the compass or needle, the horizontal angle which the magnetic needle…

l rib. (Arch.) See Cross-springer. -- Diagonal scale, a scale which consists of a set of parallel lines, with other lines crossing them obliquely, so that their intersections furnish smaller subdivisions of the unit of measure than could be conveniently marked on a plain scale. -- Diagonal stratification. (Geol.) Sam…

ce; esp., a sundial; but there are lunar and astral dials. The style or gnomon is usually parallel to the earth's axis, but the dial plate may be either horizontal or vertical.

Meeting and intersecting, as lines; not parallel; -- opposed to parallel. [Obs.] Ash.

tc., and terminated by the opposite boundaries; a straight line which bisects a system of parallel chords drawn in a curve.

Diametral curve, Diametral surface (Geom.), any line or surface which bisects a system of parallel chords drawn in a curve or surface. -- Diametral planes (Crystal.), planes in which two of the axes lie.

passing by the edges of opaque bodies or through narrow slits, causing the appearance of parallel bands or fringes of prismatic colors, as by the action of a grating of fine lines or bars. Remarked by Grimaldi (1665), and referred by him to a property of light which he called diffraction. Whewell. Diffraction grating.…

recter plane (Geom.), the plane to which all right-lined elements in a warped surface are parallel.

zzle, or near the trunnions, on the top of a piece of ordnance, to make the line of sight parallel to the axis of the bore; -- called also dispart sight, and muzzle sight.

t, either to various points in rotation, as in some motors, or along two or more lines in parallel, as in a distributing system.

A prism formed by planes parallel to a lateral axis which meet above in a horizontal edge, like the roof of a house; also, one of the planes of such a form.