Cyl`in*dra"ceous(-dr?"sh?s), a. [Cf. F. cylyndrac] Cylindrical, or approaching a cylindrical form.
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. --
(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. --
(Arch.) See under Vault,
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