snow guns

/S N OW1 G AH0 N Z/
noun
  1. 1

    A cannon that uses pressurized air and water to create snow, used for example to supplement the natural snow on a ski slope.

Synonyms

Source: https://en.wiktionary.org/wiki/snow%20gun, https://en.wiktionary.org/wiki/snow%20guns, https://en.wiktionary.org/wiki/snowgun