octogenarian

/ˌɑktəd͡ʒɪˈnɛɹiən/

/ˌɒktəd͡ʒɪˈnɛəɹɪən/

From Latin octōgēnārius + -an (suffix forming adjectives and representative nouns), either directly or via French octogénaire, from Latin octōgēnus (“80 each”) + -ārius (“-ary”), from octōgintā (“eight tens, 80”).

octogenari

Of or related to people between 80 and 89 years of age


nonagenarian

/ˈˌnɑnəd͡ʒɪˈnɛriən/

/ˈˌnoʊnəd͡ʒɪˈnɛriən/

/ˌnɒnəd͡ʒɪˈnɛːrɪən/

/ˌnəʊnəd͡ʒɪˈnɛːrɪən/

From Latin nōnāgēnārius (“containing ninety”) + -an (suffix forming adjectives and representative nouns), either directly or via French nonagénaire, from nōnāgēnī (“ninety each”) + -ārius (“-ary”), from nōnāginta (“nine tens, ninety”).

der

"But what’s that got to do with your health and longevity?" the neighbor inquired.
"Why," said the nonagenarian, "I've spent most of my life in the open air."

1954, Alben W. Barkley, editor, That Reminds Me, Garden City, NY: Doubleday & Company, →LCCN, →OCLC, →OL, page 17:


septuagenarian

/ˌsɛptəd͡ʒɪˈnɛɹiən/

/ˌsɛptəwəd͡ʒɪˈnɛɹiən/

/ˌsɛpt͡ʃəd͡ʒɪˈnɛɹiən/

/ˌsɛpt͡ʃəwəd͡ʒɪˈnɛɹiən/

/ˌsɛptjʊəd͡ʒɪˈnɛəɹɪən/

/ˌsɛptʃəd͡ʒɪˈnɛəɹɪən/

/ˌsɛptʃʊəd͡ʒɪˈnɛəɹɪən/

From Latin septuagenarius (“containing 70”) + -an (suffix forming adjectives and representative nouns), either directly or via French septuagénaire, from Latin septuagenus (“70 each”) + -arius (“-ary”), from Latin septuāginta (“seven tens, 70”).

古稀

Of or related to people between 70 and 79 years of age


centenarian

/ˌsɛnəˈnɛɹiən/

/ˌsɛntəˈnɛːrɪən/

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

suffix

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

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:

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.

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:

One who or that which is at least 100 years old.


elderly

en-adj

elderly (comparative more elderly, superlative most elderly)

more elderly (comparative)
most elderly (superlative)

old; having lived for relatively many years.

The car was parked toward the rear of the shop, an elderly gray-blue Dodge. It looked better than it had in years.

1988, Anne Tyler, chapter 1, in Breathing Lessons:

Of an object, being old-fashioned or frail due to aging.


elderly

the elderly

health insurance and retirement income for the elderly

see also Thesaurus:old person § Holonyms

(with definite article, collective) Older people as a whole.


sexagenarian

/ˌsɛksəd͡ʒɪˈnɛɹiən/

/ˌsɛksəd͡ʒɪˈnɛəɹɪən/

From Latin sexāgēnārius (“containing 60”) + -an (forming adjectives and representative nouns), either directly or via French sexagénaire, from Latin sexāgēnus (“60 each”) + -ārius (“-ary”), from sexāgintā (“six tens, 60”).

шестдесетгодишен

Of or related to people between 60 and 69 years of age


aging

en-noun

aging (countable and uncountable, plural agings)

(gerontology) The accumulation of damage to macromolecules, cells, tissues and organs with the passage of time; the progressing loss of health, mobility, vibrancy and body functionality, resulting in biological death.


senescence

senescence (usually uncountable, plural senescences)

(gerontology) Old age; accumulated damage to macromolecules, cells, tissues and organs with the passage of time.


gerontology

gerontology (usually uncountable, plural gerontologies)

The branch of science that deals with the problems of aged people. It is to be distinguished from geriatrics, which is the study of the diseases of the elderly. Gerontology covers the social, psychological and biological aspects of aging.


gerontologist

A physician who specializes in gerontology


supercentenarian

LL-Q1860 (eng)-Flame, not lame-supercentenarian.wav

From super- (“beyond, more than”) + centenarian (“100-year old”), q.v.

prefix

(loosely) Synonym of centenarian: a person more than 100 years old.


biogerontology

A subfield of gerontology that studies the biological processes of aging.


senilism

(medicine, gerontology) Premature old age.


semisupercentenarian

From semi- (“half”) + supercentenarian (“110-year old”), q.v.

We analyze the relationship between age of survival, morbidity, and disability among centenarians (age 100–104 years), semisupercentenarians (age 105–109 years), and supercentenarians (age 110–119 years).

2012 January 4, Stacy L. Andersen et al., “Health Span Approximates Life Span Among Many Supercentenarians: Compression of Morbidity at the Approximate Limit of Life Span”, in The Journals of Gerontology: Series A, volume 67A, number 4:

(uncommon) A person between 105 and 109 years old.


hexagenarian

Blend of hexa- + sexagenarian, from a conflation of Greek and Latin roots.

(uncommon, sometimes proscribed) Synonym of sixtysomething: a person between 60 and 69 years old.