Fusion
in ordinary language, the act of fusing, melting, or rendering liquid by means of heat; or the state of being melted or liquefied by means of heat. In politics, the term is used of the union of opposing parties for a common end. If a ticket should contain the names of members of two political parties with a view of securing for that ✓FUSISPORIUM ticket enough votes to defeat a nominee of a third party at an election, that would be called a "fusion ticket." In chemistry, every substance begins to fuse at a certain temperature, which is invariable for each of them if the pressure be constant. Whatever be the intensity of the source of heat, from the moment fusion commences the temperature of the body ceases to rise, and remains constant till the fusion is complete.
Some bodies have a definite fusing or melting point, as mercury at-38.8°; ice. +0; butter, +33; phosphorus, +44; sulphur, + 114; tin, + 228; lead, +335; zinc, + 422; antimony, + 450; silver, + 1,000; gold, + 1,250; and iron, + 1,500.
Some have no definite point of fusion, melting gradually. This is called vitreous fusion.