Scale on which freezing point is zero (7)

I believe the answer is:

celsius

(Other definitions for celsius that I've seen before include "Freezing point is 0 degrees on this scale" , "Scale of temperature devised by Swedish astronomer" , "Man responsible for scale" , "alternative to F spelt out?" , "Scale of temperature devised by Swiss astronomer" .)

I've seen this clue in The Times and The Sunday Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.