definition of melting point
(mp), the temperature of the equilibrium phase transition of a crystalline (solid) body to liquid at a constant external pressure. The melting point is a particular case of the temperature of the first-order phase transition. The melting points of several substances at standard pressure (760 mm Hg, or 101,325 newtons per m2) are shown in Table 1.
(mÉlt) vb, melts, melting, melted, melted or molten (ËmÉÊltÉn) 1. (Chemistry) to liquefy (a solid) or (of a solid) to become liquefied, as a result of the action of heat. 2. to become or make liquid; dissolve: cakes that melt in the mouth. 3. (often foll by away) to disappear; fade. 4. (foll by down) to melt (metal scrap) for reuse.