Przyrost

Przyrost is a Polish noun meaning increase, growth, or increment. It denotes the amount by which something grows during a specified period. The word derives from the verb przyrastać.

In biology and medicine, przyrost refers to growth in size or mass, for example przyrost masy ciała (weight gain) or przyrost wysokości (increase in height). It may describe the accumulation of tissues or other quantitative gains.

In demography, the term is most commonly used in the compound przyrost naturalny, defined as births minus deaths in a population over a chosen interval. The broader concept of population growth is called przyrost ludności, which can also include net migration.

In other fields such as economics or statistics, przyrost is used to denote any incremental increase in a measured variable, though more specialised terms like wzrost or tempo wzrostu are common depending on context. The noun is masculine; its plural is przyrosty, and its declined forms include przyrostu (genitive) and przyrostowi (dative).