👉 Progeotropic is a term used in physics and chemistry to describe a phenomenon where the concentration of a substance increases or decreases as it is heated from a lower temperature. This increase or decrease in concentration can be due to changes in the substance's molecular structure, such as when a substance undergoes a phase change (like melting), or by other mechanisms like diffusion. Progeotropic phenomena are often observed in the chemical and biological systems where changes in the composition of substances are important for their function.