Definition of ice screw in US English:

ice screw

noun

  • 1Any one of a number of screws attached to the sole of a shoe to prevent the wearer from slipping on ice.

  • 2An ice-elevator of which the platform is raised and lowered by means of a central screw.

  • 3An ice-piton which is screwed, rather than hammered, into the ice.

Origin

Early 19th century.