Age and Ageing
Age
Age (/eɪdʒ/; from the Latin aetas, meaning "lifetime") is the length of time that a person or thing has existed. It is often used as a measure of the stages of life and the process of growing older.
Etymology
The word "age" comes from the Old French aage, which is itself derived from the Latin word aetas. The Latin word is related to aevum, meaning "lifetime" or "eternity".
Related Terms
- Life expectancy: The average period that a person may expect to live.
- Senescence: The condition or process of deterioration with age.
- Gerontology: The study of the social, cultural, psychological, cognitive, and biological aspects of ageing.
- Longevity: The fact of living for a long time.
- Mortality rate: A measure of the number of deaths in a particular population, scaled to the size of that population, per unit of time.
Ageing
Ageing or aging (/ˈeɪdʒɪŋ/; from the Old English on-gian, meaning "to grow old") is the process of becoming older. It represents the accumulation of changes in a person over time.
Etymology
The term "ageing" comes from the Old English on-gian, which means "to grow old". The word "aging" is the American English spelling.
Related Terms
- Senility: The condition of being senile.
- Geriatrics: The branch of medicine or social science dealing with the health and care of old people.
- Biological ageing: The gradual deterioration of function characteristic of most complex lifeforms, arguably found in all biological kingdoms, that on the level of the organism increases mortality after maturation.
- Chronological ageing: The passage of time since birth.
External links
- Medical encyclopedia article on Age and Ageing
- Wikipedia's article - Age and Ageing
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