Ageing (disambiguation)
Aging is the effect of time on a person. Aging or ageing may also refer to: == Biology == Senescence, the biological effect of time on an organism Aging in cats Aging in dogs == Demography == Population ageing, a shift in the distribution of a population towards older ages == Chemistry and materials science == Polymer degradation, a change of polymer properties due to environmental factors Precipitation hardening, a heat treatment of materials Ostwald ripening, precipitate or deposit aging in chemistry Ageing (textiles), after treatment of textiles == Food preparation == Aging (food), the leaving of a product to improve its flavor Aging of wine, the effect of time on wine Barrel aging, a method of maturing wine, spirits, etc.