Dictionary of Human Evolution and Biology

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Biologic process marked by the decline of bodily function and individual adaptability (see entropy) that commences at conception and proceeds until the death of an individual. Aging is variously described as the end of growth, or the increasing probability of mortality with time. Aging is universal, progressive, deleterious, and intrinsic.

See senescence, Hayflick limit, longevity, and telomere.

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