See also: subzero

English

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Etymology

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From sub- +‎ zero.

Adjective

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sub-zero (not comparable)

  1. (of a temperature) below 0°C; freezing cold
    • 2021 February 24, “Network News: NR takes pride in track teams as effects of Storm Darcy repelled...”, in RAIL, number 925, page 13:
      Several days of sub-zero temperatures caused icicles up to 1.5 metres long to form in tunnels across Greater Manchester, Lancashire and Cumbria.
  2. (US, of a temperature) below 0°F (−18°C)

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