The Collaborative International Dictionary of English v.0.48:

Ice skater \Ice" skat`er\n.
   One who skates on ice wearing an ice skate; esp. an athlete
   who performs athletic or artistic movements on a sheet of
   ice, wearing ice skates; a speed skater or a figure
   skater.
   [PJC]

WordNet (r) 3.0 (2006):

speed skater
    n 1: an ice-skater who races competitively; usually around an
         oval course [syn: speedskater, speed skater]