What is the name of the process by which a solid changes directly into a gas?

Sublimation is the process by which a solid changes directly into a gas without passing through the liquid phase. This phenomenon occurs when the molecules of a solid gain enough energy to break free from their fixed positions and transition into the gas phase. Common examples of sublimation include dry ice (solid carbon dioxide) and the gradual shrinking of snow or ice in cold, dry conditions. Sublimation is used in various applications, such as freeze-drying food and preserving biological samples, because it can remove moisture without damaging the substance.