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2.12
History
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octogenarian noun [ ˌɒktə(ʊ)dʒɪˈnɛːrɪən ]

• a person who is between 80 and 89 years old.
• "the octogenarian is making his TV writing debut"
Origin: early 19th century: from Latin octogenarius (based on octoginta ‘eighty’) + -an.

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