natation

from WordNet (r) 3.0 (2006)

natation
    n 1: the act of someone who floats on the water [syn:
         {floating}, {natation}]

from The Collaborative International Dictionary of English v.0.48

Natation \Na*ta"tion\, n. [L. natatio, fr. natare to swim: cf.
   F. natation. See {Natant}.]
   The act of floating on the water; swimming. --Sir T. Browne.
   [1913 Webster]