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Having every portion of the surface or of the circumference equally distant from the center; spherical; circular; having a form approaching a spherical or a circular shape; orbicular; globular; as, a round ball. "The big, round tears." Shak. Upon the firm opacous globe Of this round world. Milton.

ver. -- Scoop wheel, a wheel for raising water, having scoops or buckets attached to its circumference; a tympanum.

The half of a circle; the part of a circle bounded by its diameter and half of its circumference.

a right line, drawn from the center of a circle, a sphere, or other curved figure, to its circumference or periphery; a radius.

he earth is a terraqueous globe. Cudworth. The grand terraqueous spectacle From center to circumference unveiled. Wordsworth.

A ring of thin metal formed with a grooved circumference so as to fit within an eye-spice, or the like, and protect it from chafing.

A hoop or band, as of metal, on the circumference of the wheel of a vehicle, to impart strength and receive the wear.

Denticete. -- Toothed wheel, a wheel with teeth or projections cut or set on its edge or circumference, for transmitting motion by their action on the engaging teeth of another wheel.

The part of a cut gem between the girdle, or circumference, and the table, or flat upper surface. Knight.

The surface described by the circumference of a circle revolving about a straight line in its own plane.

-- Tub wheel, a horizontal water wheel, usually in the form of a short cylinder, to the circumference of which spiral vanes or floats, placed radially, are attached, turned by the impact of one or more streams of water, conducted so as to strike against the floats in the direction of a tangent to the cylinder.…

Having the circumference of a tun. [Obs.] Chaucer.

s by which water is raised to the axis when the wheel revolves with the lower part of the circumference submerged, -- used for raising water, as for irrigation.

A circumference; a circle; a ring. The inclusive verge Of golden metal that must round my brow. Shak.

wheel fixed to an axle, and used for raising great weights, by applying the power to the circumference of the wheel, and attaching the weight, by a rope or chain, to that of the axle. Called also axis in peritrochio, and perpetual lever, -- the principle of equilibrium involved being the same as in the lever, while it…

ing 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.

hich figures made to revolve on the inside of a cylinder, and viewed through slits in its circumference, appear like a single figure passing through a series of natural motions as if animated or mechanically moved.

Circuit; circumference. [R.] Milton. Abyssal zone. (Phys. Geog.) See under Abyssal. -- Zone axis (Crystallog.), a straight line passing through the center of a crystal, to which all the planes of a given zone are parallel.