Ice-men were a race of people believed by the pre-industrial Barkonians to live in the snow and ice of the Vellorian Mountains of their planet, Barkon IV. Skin and eye coloration of icemen were theorized to have been different due to prolonged exposure to harsh winter conditions.
After suffering amnesia from a shuttle accident, Talur, a native of the planet, erroneously claimed the android Lieutenant commander Data to be an ice-man because of his pale physical features, smell-less breath, slightly odd heartbeat, and remarkable set of teeth. Great strength was also observed in this "ice-man", which was deemed unexpected. (TNG: "Thine Own Self")