The US FDA’s proposed rule on laboratory-developed tests: Impacts on clinical laboratory testing

A thermometer calibratit in degrees Celsius
  Kintras that use Fahrenheit.
  Kintras that use both Fahrenheit an Celsius.
  Kintras that use Celsius.

Celsius is a scale an unit o meisurment for temperatur. As an SI derived unit, it is uised bi maist kintras in the warld. It is named efter the Swadish astronomer Anders Celsius (1701–1744), wha developed a seemilar temperatur scale. The degree Celsius (°C) can refer tae a speceefic temperatur on the Celsius scale as well as a unit tae indicate a temperatur interval, a difference atween twa temperaturs or an uncertainty.