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imensions, extension which has length and breadth, but no thickness; a plane or curved surface. -- Space of three dimensions, extension which has length, breadth, and thickness; a solid. -- Space of four dimensions, as imaginary kind of extension, which is assumed to have length, breadth, thickness, and also a fourth…

A slight natural depression or indentation on the surface of some part of the body, esp. on the cheek or chin. Milton. The dimple of her chin. Prior.

d in Australia, but supposed to have introduced at a very early period. It has a wolflike face, bushy tail, and a reddish brown color.

e eye of an observer between a horizontal line and a tangent drawn from the eye to the surface of the ocean. -- Dip of the needle, or Magnetic dip, the angle formed, in a vertical plane, by a freely suspended magnetic needle, or the line of magnetic force, with a horizontal line; -- called also inclination. -- Dip of…

posed in the form of a prism, so that, by the reflections of the sun's rays from their surfaces, two images are presented to the eye, moving in opposite directions, and coinciding at the instant the sun's center is on the meridian.

A solid bounded by twenty-four similar quadrilateral faces. It is a hemihedral form of the hexoctahedron.

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

f the curve generated by it; the line along which the generatrix moves in generating a surface.

The line of motion along which a describent line or surface is carried in the genesis of any plane or solid figure; a directrix. Hutton.

ischarging a Leyden jar, or electrical battery, by making a connection between the two surfaces; a discharging rod.

Want of continuity or cohesion; disunion of parts. "Discontinuity of surface." Boyle.

eciated. -- Bank discount, a sum equal to the interest at a given rate on the principal (face) of a bill or note from the time of discounting until it become due. -- Discount broker, one who makes a business of discounting commercial paper; a bill broker. -- Discount day, a particular day of the week when a bank dis…

The act of disfiguring, or the state of being disfigured; defacement; deformity; disfigurement. Gauden.

To mar the figure of; to render less complete, perfect, or beautiful in appearance; to deface; to deform. Disfiguring not God's likeness, but their own. Milton.

That which disfigures; a defacement; a blot. Uncommon expressions . . . are a disfigurement rather than any embellishment of discourse. Hume.

The whole surface of a leaf.

A friction clutch in which the gripping surfaces are disks or more or less resemble disks.

To efface, as a picture. [Obs.] Shak.

Want of resemblance; unlikeness; dissimilitude; variety; as, the dissimilarity of human faces and forms. Sir W. Jones.

teristic. Not more distinguished by her purple vest, Than by the charming features of her face. Dryden. Milton has distinguished the sweetbrier and the eglantine. Nares.