manifolds

noun

1. A copy made by the manifold writing process.

2. A pipe fitting or similar device that connects multiple inputs or outputs.

3. (chiefly in the plural) The third stomach of a ruminant animal, an omasum.

4. A topological space that looks locally like the "ordinary" Euclidean space \mathbb{R}^n and is Hausdorff.

5. A polygon mesh representing the continuous, closed surface of a solid object