centenarian

From Latin centēnārius +‎ -an,^[1] equivalent to centenary (“100 year, 100th anniversary”) +‎ -an (“person”).

• (General American) IPA^(key): /ˌsɛnəˈnɛɹiən/, /ˌsɛntəˈnɛɹiən/
• (Received Pronunciation) IPA^(key): /ˌsɛntəˈnɛːrɪən/

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centenarian (plural centenarians)

1. One who or that which is at least 100 years old.
   • 1894 October 19, “Sex and Long Life”, in Public Opinion: A Comprehensive Summary of the Press Throughout the World on All Important Current Topics, volume LXVI, number 1,726, London:

     The average age of these 203 centenarians was 102 years 5 months and 25 days.

   • 2003, Kit Anderson, Nature, Culture, and Big Old Trees: Live Oaks and Ceibas in the Landscapes of Louisiana and Guatemala, University of Texas Press, →ISBN, page 136:

     He proposed the formation of the Louisiana Live Oak Association, whose members would be trees at least a hundred years old. First among the centenarians he listed was the Locke Breaux oak, the largest tree he knew, measuring 10.7 m (35 ft.) in circumference, 22.8 m (75 ft.) tall, with a spread of 50.6 m (166 ft.) in 1932.

   • 2014 September 18, Gregg Easterbrook, “What Happens When We All Live to 100?”, in The Atlantic‎^[1], →ISSN:

     Centenarians may become the norm, rather than rarities who generate a headline in the local newspaper.

• hundred-year-old; supercentenarian (inexact); centenary (obsolete, rare)

centenarian (comparative more centenarian, superlative most centenarian)

1. Aged 100 years or more; extremely old.
2. Of or relating to centenarians or a centenary celebration.

• (aged 100 years): hundred-year-old, centenary