nappe

1 definition found

nappe - Collaborative International Dictionary of English v.0.48 :

  Nappe \Nappe\, n. [F. nappe cloth, sheet. See Napery.] (Geom.)
     Sheet; surface; all that portion of a surface that is
     continuous in such a way that it is possible to pass from any
     one point of the portion to any other point of the portion
     without leaving the surface. Thus, some hyperboloids have one
     nappe, and some have two.
     [1913 Webster]