gerontology
noun/ˌdʒerɒnˈtɒlədʒi/
/ˌdʒerənˈtɑːlədʒi/
[uncountable]- the scientific study of old age and the process of growing oldTopics Life stagesc2Word Originearly 20th cent.: from Greek gerōn, geront- ‘old man’ + -logy.
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gerontology