Discolouration refers to the alteration or change in color of an object, substance, or surface, typically resulting in a deviation from its original or natural shade. It is a term used to describe the process or state of becoming discolored or the result of such a change. Discolouration can occur in numerous contexts, such as in materials, fabrics, surfaces, or biological matter.
In the context of materials, discolouration often arises due to exposure to external factors, such as light, heat, moisture, chemicals, or pollutants. For instance, when an object made of metal or wood comes into contact with oxidizing agents or undergoes corrosion, it may experience discolouration, leading to a loss of its original appearance or shade.
Discolouration can also be induced by biological processes, where organisms can cause changes in color. This can occur, for example, when the growth of bacteria or fungi leads to stains or patches on surfaces like walls, fabrics, or organic matter.
Additionally, discolouration can emerge as a result of chemical reactions or aging processes. Over time, certain substances may react and cause pigments to fade or change, leading to visible discolouration. In the context of human bodies, discolouration may refer to changes on the skin, nails, or teeth, which can be caused by various factors like disease, injury, medication, or lifestyle habits.
Overall, discolouration characterizes the alteration or loss of color in an object, substance, or living organism, often resulting from exposure to external agents, chemical reactions, biological processes, or natural aging.
