manifold

adjective

• many and various:the implications of this decision were manifold
• having many different forms or elements:the appeal of the crusade was manifold

noun

• 1a pipe or chamber branching into several openings: US aircraft attacked the pipeline manifold feeding the Sea Island
• (in an internal-combustion engine) the part conveying air and fuel from the carburettor to the cylinders or that leading from the cylinders to the exhaust pipe: the exhaust manifold

• 2 Mathematics a collection of points forming a certain kind of set, such as those of a topologically closed surface or an analogue of this in three or more dimensions.