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. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Celsius

Source: WordNet (r) 2.0
 

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: Webster's Revised Unabridged Dictionary (1913)