norimon

[Japanese.) A Japanese palanquin. nör'-ite, s. [From the Skander Norga in Norway, where the rock was first discovered (?).] of contact. "The resultant of centrifugal force and gravity must be normal to the surface." -Everett : C. G. S. System of Units (1875), p. 16. 3. Zool., .: Conforming to the ordinary standard, according to rule; ordinary, natural. B. As substantive: Geom.: A normal to a plane curve is a straight line in the plane of the curve perpendicular to the tangent at the point of contact. The name normal is also given to that portion of the normal lying between the point of contact and the point in which the normal cuts the axis. The term normal is sometimes used to denote the distance from the point of contact to the center of the osculatory circle at the point of contact. The normal to a curve of double curvature is a straight line lying in the osculatory plane and perpendicular to the tangent at the point of contact. A normal plane to a curve is a plane through the normal line perpendicular to the tangent at the point of contact. A normal line to a surface is a straight line perpendicular to the tangent plane at the point of contact. The length of the normal is the distance from the point of contact to the center of the osculatory sphere at the point. A normal plane to a surface is any plane pa ed through a normal line to the surface. normal-groups, s. pl. Geol.: Groups of certain rocks taken as a rule or standard. ( Lyell .) normal-school, s. [Fr. école normale .] A training college; a school or college in which teachers are trained for their profe ion.