"Powder" is a fine, dry substance made by grinding or crushing solid materials. It is commonly used in various industries, including food, cosmetics, and pharmaceuticals. Different types of powders serve specific purposes, such as baking powder in cooking or talcum powder for personal care. In the context of science, powder can refer to materials like metal powders used in 3D printing or pharmaceuticals in powdered form for easy consumption. The properties of powders, such as particle size and flowability, are important for their applications, influencing how they mix, dissolve, or react with other substances.