Related to Möbiusstrip: Klein bottle, August Ferdinand Möbius

Mö′bi•us strip`

(ˈmœ bi əs, ˈmeɪ-, ˈmoʊ-)

a continuous, one-sided surface formed by twisting one end of a rectangular strip through 180° about the longitudinal axis of the strip and attaching this end to the other. Also called Mö′bius band`.
[1900–05; after August Ferdinand Möbius (1790–1868), German mathematician]