Here are the possible solutions for centigrade freezing level clue
Answer
Clue
Relevancy
zero
Clue
Centigrade freezing level
Centigrade freezing point of water
Centigrade freezing point
Centigrade's freezing point
celsius
Clue
Inventor of the centigrade thermometer
ozone
Clue
Low-level pollution or high-level protection
Definition
an allotropic form of oxygen present in the atmosphere
ptomaineconcourse
Clue
Warning sign at a train station's food court? (NOTE: The original sign, without my additions, actually exists. It's in Grand Central Terminal in NYC, on the lower level — the food court level. The sig
