Foliation Leaf
Let M^n be an n-manifold and let F={F_alpha} denote a partition of M into disjoint pathwise-connected subsets. Then if F is a foliation of M, each F_alpha is called a leaf and is not necessarily closed or compact.
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References
Rolfsen, D. Knots and Links. Wilmington, DE: Publish or Perish Press, p. 284, 1976.Referenced on Wolfram|Alpha
Foliation LeafCite this as:
Weisstein, Eric W. "Foliation Leaf." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/FoliationLeaf.html