Parametric quantity refers to a quantity that can be expressed in terms of a parameter, which is a variable that describes a characteristic of a particular system or phenomenon. Some synonyms for this term include parameter, variable, factor, component, attribute, and characteristic. These words are commonly used in various fields such as mathematics, physics, engineering, and economics, to describe quantities that depend on one or more parameters. For instance, in physics, the temperature of a gas can be described as a parametric quantity since it depends on various parameters such as the number of molecules, their size, and their motion. Overall, parametric quantity is an important concept that plays a significant role in understanding different systems and phenomena.