CYLINDER.—A solid bounded by a curved surface and by two opposite faces called bases; the bases may be any curved figures and give the name to the cylinder; thus a circular cylinder is one whose bases are circles.
CYLINDRICAL.—Having the general form of a cylinder.
DEGREE.—The 360th part of a circle.
DESCRIBE.—To make or draw a curved line; to draw a plan.
DESIGN.—Any arrangement or combination to produce desired results in industry or art. To delineate a form or figure by drawing the outline—a sketch.
DEVELOP.—To unroll or lay out.
DIAGONAL.—A right line drawn from angle to angle of a quadrilateral or many angled figure and dividing it into two parts.
DIAMETER.—A right line passing through the center of a circle or other round figure terminated by the curve and dividing the figure symmetrically into two equal parts.
EDGE.—The intersection of any two surfaces.
ELEVATION.—The term elevation, vertical projection and front view—applied to drawings—all have the same meaning.