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Any permanent mark to which other levels may be referred. Specif. : A horizontal mark at the water's edge with reference to which the height of tides and floods may be measured.

The marking of the clothes with stripes or horizontal bands. [Obs.] Chaucer.

cording to the shape of the instrument and the manner of throwing it, often moving nearly horizontally a long distance, then curving upward to a considerable height, and finally taking a retrograde direction, so as to fall near the place from which it was thrown, or even far in the rear of it.

consist of two light rectangular boxes, or cells open on two sides, and fastened together horizontally. Called also Hargrave, or cellular, kite.

A rope reeved through a block at the end of a yard, by which the yard is moved horizontally; also, a rudder gudgeon.

Having branches in pairs, decussated, all nearly horizontal, and each pair at right angles with the next, as in the maple and lilac.

The horizontal bar of an andiron.

t, sometimes only a frog with a loop, but in some military uniforms enlarged into a broad horizontal stripe.

An inclination from a horizontal or vertical line; a slope or bevel; a titl. Totten.

on the dexter side, formed by a perpendicular line from the top of the shield, meeting a horizontal line from the side. The king gave us the arms of England to be borne in a canton in our arms. Evelyn.

they suckle for some time. The anterior limbs are changed to paddles; the tail flukes are horizontal. There are two living suborders: (a) The Mysticete or whalebone whales, having no true teeth after birth, but with a series of plates of whalebone [see Baleen.] hanging down from the upper jaw on each side, thus making…

The horizontal projection of a chimney from the wall in which it is built; -- commonly applied to its projection in the inside of a building only.

The upper or lower part of a truss, usually horizontal, resisting compression or tension. Waddell. Accidental, Common, and Vocal chords. See under Accidental, Common, and Vocal. -- Chord of an arch. See Illust. of Arch. -- Chord of curvature, a chord drawn from any point of a curve, in the circle of curvature for tha…

A surveying instrument, for taking horizontal angles and bearings; a surveyor's compass. It consists of a compass whose needle plays over a circle graduated to 360º, and of a horizontal brass bar at the ends of which are standards with narrow slits for sighting, supported on a tripod by a ball and socket joint.…

The last stone in a horizontal course, if of a less size than the others, or a piece of brick finishing a course. Gwilt.

Built of logs, etc., laid horizontally, with the ends dovetailed together at the corners, as in a log house; in marine work, often surrounding a central space filled with stones; as, a cobwork dock or breakwater.

A curb, or a horizontal timbering, around the mouth of a shaft. Raymond. Collar beam (Arch.), a horizontal piece of timber connecting and tying together two opposite rafters; -- also, called simply collar. -- Collar of brawn, the quantity of brawn bound up in one parcel. [Eng.] Johnson. -- Collar day, a day of great…

A telescope arranged and used to determine errors of collimation, both vertical and horizontal. Nichol.

bowl containing it is suspended in gimbals within the binnacle, in order to preserve its horizontal position. -- Surveyor's compass, an instrument used in surveying for measuring horizontal angles. See Circumferentor. -- Variation compass, a compass of delicate construction, used in observations on the variations of…

on of anything, as of the head for fitting a hat, or, in craniometry, finding the largest horizontal area of the head.