Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A one-sided topological surface having no inside or outside. It is depicted in ordinary space by inserting the small open end of a tapered tube through the side of the tube and making it contiguous with the larger open end, although a true Klein bottle would not intersect itself.

Etymologies

After Felix Klein (1849-1925), German mathematician.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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