manifolds

noun

1. 1.A copy made by the manifold writing process.
2. 2.A pipe fitting or similar device that connects multiple inputs or outputs.
3. 3.(chiefly in the plural) The third stomach of a ruminant animal, an omasum.
4. 4.A topological space that looks locally like the "ordinary" Euclidean space \mathbb{R}^n and is Hausdorff.
5. 5.A polygon mesh representing the continuous, closed surface of a solid object