Definition of Celsius adjective from the Oxford Advanced American Dictionary

 

Celsius

 adjective
adjective
NAmE//ˈsɛlsiəs//
 
(also centigrade)(abbreviation C)
 
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of or using a scale of temperature in which water freezes at 0° and boils at 100° the Celsius Scale Bees can raise their body temperature to above 37 degrees Celsius (98.6 degrees Fahrenheit).
Celsiusnoun[uncountable]
 
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temperatures in Celsius and Fahrenheit