Noun
the presence of heat
Source: WordNetIt doesn't matter whether you can or cannot achieve high temperature superconductivity or fuel cells, they will always be on the list because if you could achieve them they would be extremely valuable. Martin Fleischmann
If you assume that it was a valid experiment, then its disintegration reveals a very substantial part of what has been found since then, including the fact that you can get heat generation at high temperature. Martin Fleischmann
We cannot doubt after what we know of the power of heat that the nebulous form of matter was attended by the condition of a very high temperature. Robert Chambers (publisher born 1802)