The Collaborative International Dictionary
Cylindric surface
Cylindric \Cy*lin"dric\ (s?-l?n"dr?k), Cylindrical \Cy*lin"dric*al\ (-dr?-kal), a. [Gr. kylindriko`s, from ky`lindros cylinder: cf. F. cylindrique.] 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 surface, or Cylindrical surface (Geom.), a surface described by a straight line that moves according to any law, but so as to be constantly parallel to a given line.
Cylindrical vault. (Arch.) See under Vault, n.