CONTOUR n.
The outline of a horizontal section of the ground, or of works of fortification. Contour feathers (Zoöl.), those feathers that form the general covering of a bird. -- Contour of ground (Surv.), the outline of the surface of ground with respect to its undulation, etc. -- Contour line (Topographical Suv.), the line in…
CYLINDRIC; CYLINDRICAL a.
Having the form of a cylinder, or of a section of its convex surface; partaking of the properties of the cylinder. Cylindrical lens, a lens having one, or more than one, cylindrical surface. -- Cylindric, or Cylindrical, surface (Geom.), a surface described by a straight line that moves according to any law, but so as…
DIAMETER n.
Any right line passing through the center of a figure or body, as a circle, conic section, sphere, cube, etc., and terminated by the opposite boundaries; a straight line which bisects a system of parallel chords drawn in a curve.