ˈselsēəs, -lshəs adjective
Usage: usually capitalized
Etymology: after Anders Celsius died 1744 Swedish astronomer who invented the centigrade scale
: relating to, conforming to, or having the international thermometric scale on which the interval between the two standard points, the triple point and the boiling point of water, is divided into 99.99 degrees, 0.01° representing the triple point and 100.00° the boiling point ; also : centigrade
a celsius thermometer
10° celsius
— abbr. C