cy·lin·dri·cal /səˈlɪndrɪkəl/
  (a.)圓筒.圓柱狀的
  cylindrical
  筒狀物	*
  Cy·lin·dric Cy·lin·dric·al 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 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.
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  cylindrical
       adj 1: having the form of a cylinder or tube [syn: tube-shaped, tubelike,
               vasiform]
       2: related to or having the shape or properties of a cylinder
          [syn: cylindric]