A supercentenarian (sometimes hyphenated as super-centenarian) is someone who has reached the age of 110 years or more, something achieved by only one in a thousand centenarians (based on European data). Furthermore, only 2% of supercentenarians live to be 115.
The term has been around at least since the 1970s (as one citation, Norris McWhirter editor of the Guinness Book of World Records, used the word in correspondence with age claims researcher A. Ross Eckler, Jr. in 1976), and was further popularized in 1991 by William Strauss and Neil Howe in their book entitled Generations. Early references tend to mean simply "someone well over 100," but the 110-and-over cutoff is the accepted criterion of demographers
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