Definition of Celsius in US English:


(also C)


  • postpositive when used with a numeral Of or denoting a scale of temperature on which water freezes at 0° and boils at 100° under standard conditions.

    • ‘The Kelvin scale uses Celsius units, the main difference being that zero on the Kelvin scale is absolute.’
    • ‘Without greenhouse gases the earth's average surface temperature would be about 35° Celsius cooler.’
    • ‘It is better to pre-treat and pre-soak heavily soiled clothing and use a warm wash, of around 50 Celsius degrees, to conserve energy.’
    • ‘The debut of summer saw temperatures entering the 30 degrees Celsius range.’
    • ‘It was two o'clock in the afternoon and thirty-two degrees Celsius outside with the humidity at 88%.’
    • ‘So far, studies show that platform level air temperatures will very rarely be above 20 degrees Celsius or lower than freezing.’
    • ‘Swindon Council's highways department was on red alert as temperatures plunged to 5 degrees Celsius overnight.’
    • ‘They even use Celsius temperatures, which nobody understands.’
    • ‘The ship's diving team took the opportunity to progress continuation training in the pristine 31 degrees Celsius waters around the port.’
    • ‘Temperatures throughout the region hovered around the minus five degrees Celsius range for most of the two week storm.’
    • ‘They are most comfortable in water about 25 degrees Celsius, or slightly higher for breeding.’
    • ‘The dampness and high temperature of about 25 degrees Celsius provides the best conditions for mould to grow and reproduce.’
    • ‘I have personally been to both in the midst of winter and enjoyed temperatures around the 20 degrees Celsius mark.’
    • ‘Instead of a global temperature rise of 2.1 degrees Celsius occurring by 2094, it will be postponed to 2100.’
    • ‘For an hour and a half in the oppressive, dry 35 Celsius degree heat of the day we traveled across the valley and hiked up to the top of Graveyard pass.’
    • ‘Biological records show that insect species are appearing six days earlier on average for each degree Celsius rise in temperature.’
    • ‘Without these greenhouse gases the earth's average surface temperature would be about 33 degrees Celsius cooler.’
    • ‘Citizens experienced the heat of summer as the temperature rocketed to 34 Celsius degrees last Sunday.’
    • ‘Water exposed to atmospheric pressure boils at approximately 100 degrees Celsius.’
    • ‘Transfer the meat to a 200 degree Celsius oven for 10 minutes and stand for a further 5 minutes before serving.’


  • The scale of temperature in which water freezes at 0° and boils at 100° under standard conditions.

    • ‘I have similar problems with temperature - cold temperatures work best in Celsius, hot in Fahrenheit.’
    • ‘My cheat for C to F is to take the temperature in Celsius, double it and add it to 30.’
    • ‘The confusion arises due to the other common temperatures scale, the Celsius scale (based on the old Centigrade scale).’
    • ‘The other features on the front are three buttons for setting the temperature and fan speed alarms, changing from Celsius to Fahrenheit and resetting the alarms.’
    • ‘Likewise, we can measure temperatures on the Celsius or Fahrenheit scales.’
    • ‘The Fahrenheit and Celsius scales are based on two fixed points, the Kelvin and Rankine scales are based on one.’
    • ‘The Celsius temperature scale (°C) was developed by Anders Celsius in 1742.’
    • ‘But I've never, ever learned to intuit Celsius as a way to express temperature.’
    • ‘But whether you calculate in Fahrenheit or Celsius, the overall winner is usually selected by a matter of shades and degrees.’
    • ‘The kelvin (K) temperature scale is an extension of the degree Celsius scale down to absolute zero, a hypothetical temperature characterized by a complete absence of heat energy.’
    • ‘Most of our temperatures will be presented in Celsius, but you can grab a Celsius to Fahrenheit converter here.’
    • ‘If you did the bloody thing your IQ and the temperature right now in Celsius are about one and the same.’


Celsius rather than centigrade is the standard accepted term when giving temperatures: use 25° Celsius rather than 25° centigrade