Isothermal layers refer to the layers of air in the atmosphere that have an almost constant temperature - which means they experience minimal changes in temperature with altitude. These layers are crucial in understanding atmospheric conditions and weather patterns. The term 'isothermal layers' can be replaced with several synonyms such as constant-temperature layers, uniformly heated layers, and temperature equilibrated layers. Other synonyms include thermal equilibrium layers, homothermal layers, and isometric layers. Understanding these synonyms can help in effective communication among meteorologists and scientists, who use these terms regularly in their research. Overall, the importance of isothermal layers, and their synonyms, cannot be overstated in the field of meteorology and atmospheric studies.