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.
   [1913 Webster]

   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.
      [1913 Webster]