👉 The term "liquidus" is a Latin word that refers to a state of being in liquid or fluid form. In physics, it describes the state of a substance where its density and volume are both zero. Liquidus can be defined as a state of matter where the substance is neither solid nor gas but rather an ideal mixture of two phases: a solid phase and a liquid phase. The liquidus is characterized by being at a constant temperature and pressure, meaning that it has no specific volume or
