1789, with -an + French octogénaire "aged 80," from Latin octogenarius "containing eighty," from octogeni "eighty each," related to octoginta "eighty," from octo "eight" (see eight) + -genaria "ten times," from PIE *dkm-ta-, from *dekm- "ten" (see ten). As an adjective from 1784.
实用例句
1. She is very active for an octogenarian.
她已经是八旬老人了,还很精神.来自《简明英汉词典》
2. She is a very active octogenarian.
她已经是八旬老人了，还很精神。来自辞典例句
3. I saw a very beautiful old lady, octogenarian person, very unruffled very gentle appearance.
