The term "Critical Temperature" refers to the highest temperature at which a substance can exist as a liquid. Above this temperature, the substance transitions into a gas regardless of the pressure applied. This concept is crucial in understanding phase transitions in materials, particularly in fields like chemistry and physics. In the context of superconductors, the critical temperature is significant because it determines the temperature below which a material can exhibit superconductivity, allowing it to conduct electricity without resistance. Understanding critical temperature helps scientists and engineers design better materials for various applications, including magnetic levitation and quantum computing.