|says universe's massive particles attract other such particles with force proportional to their mass|
|single, usually sudden, flow of current in one direction|
|1.||a vessel in which substances are heated to high temperatures|
|2.||the hearth at the bottom of a metallurgical furnace in which the metal collects|
|3.||a severe trial or test|
|[C15 corusible, from Medieval Latin crūcibulum night lamp, crucible, of uncertain origin]|
|crucible (kr'sə-bəl) Pronunciation Key
A heat-resistant container used to melt ores, metals, and other materials.