a surface formed by inserting the smaller end of an open tapered tube through the surface of the tube and making this end contiguous with the other end
Word origin
named after Felix Klein (1849–1925), German mathematician
Klein bottle in American English
noun
Geometry
a one-sided figure consisting of a tapered tube the narrow end of which is bent back, run through the side of the tube, and flared to join the wide end, thereby allowing any two points on the figure to be joined by an unbroken line
Word origin
[1940–45; named after F. klein]This word is first recorded in the period 1940–45. Other words that entered Englishat around the same time include: airlift, redline, sealant, set-aside, zap