Source : Webster's Revised Unabridged Dictionary (1913)

Celsius \Cel"si*us\, n.
   The Celsius thermometer or scale, so called from Anders
   Celsius, a Swedish astronomer, who invented it. It is the
   same as the centigrade thermometer or scale.

Source : WordNet®

Celsius
     n : Swedish astronomer who devised the centigrade thermometer
         (1701-1744) [syn: {Anders Celsius}]