Cel ‧ si ‧ us /ˈselsiəs/ BrE AmE noun [uncountable] ( written abbreviation C )
[ Date: 1800-1900 ; Origin: Anders Celsius (1701-44), Swedish scientist who invented the scale ]
a scale of temperature in which water freezes at 0º and boils at 100º SYN Centigrade ⇨ Fahrenheit :
12º Celsius (=12 degrees on the Celsius scale)
—Celsius adjective