præg

Próg is a Polish noun meaning threshold, the boundary or starting point at which a change occurs. It covers both literal uses and figurative senses and is employed across many disciplines. The term can denote a physical boundary, such as the sill of a doorway, or a limit beyond which a reaction or event is triggered.

In everyday language and measurement contexts, pror often describe limits that must be crossed to achieve a result or to perceive an effect. For example, one might refer to a safety threshold for exposure or the point at which a condition becomes noticeable. The concept also appears in statistical and decision-making contexts as a threshold level that separates categories or triggers a response.

In science and medicine, Próg designates perceptual and physiological boundaries: próg czucia (sensation threshold), próg bólu (pain threshold), próg absolutny (absolute threshold), and próg różnicy (difference threshold). In electronics and physics, napięcie progowe (threshold voltage) is the minimum voltage required for a device to conduct or switch. In pharmacology, dose–response relationships are discussed in terms of thresholds for observable effects.

In ecology and environmental science, próg ekologiczny denotes a tipping point beyond which small changes can produce disproportionately large or potentially irreversible effects on an ecosystem. The term also appears in economics, psychology, and engineering with similar connotations of a boundary or triggering level.

Overall, Próg serves as a versatile concept for describing boundaries, minimum levels, and initiating points that determine when and how systems respond.