
1) Chemical property
Found on
https://www.crosswordclues.com/clue/smoke-point

In cooking, the smoke point of an oil or fat is the temperature at which, under defined conditions, enough volatile compounds emerge from the oil that a bluish smoke becomes clearly visible. At this temperature, volatile compounds, such as water, free fatty acids, and short-chain degradation products of oxidation come up from the oil. The smoke po...
Found on
http://en.wikipedia.org/wiki/Smoke_point

The point at which fat breaks down, starts to smoke and gives off an odor. Different fats have different smoke points.
Found on
http://www.encyclo.co.uk/local/20111
No exact match found.