semicentenarian

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semicentenarian

/ˌsɛˌmaɪˌsɛnəˈnɛriən/ US
/ˌsɛˌmaɪˌsɛntəˈnɛriən/ US
/ˌsɛmɪsɛntəˈnɛːrɪən/ UK

Where it comes from

From semicentenary (“50 year, 50th anniversary”) + -ian (“person”), equivalent to semi- (“half”) + centenarian (“100-year-old”), q.v.

noun semicentenarians

Synonym of fiftysomething: A person celebrating a semicentenary; a person between 50 and 59 years old.
Similar: fiftysomething

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MLA

"semicentenarian." Wiktionary, via Micwyn, micwyn.com/word/semicentenarian. Accessed 6 Nov. 2026.

APA

semicentenarian. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/semicentenarian

Chicago

"semicentenarian." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/semicentenarian.

BibTeX

@misc{semicentenarian_2026,
  title = {semicentenarian},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/semicentenarian},
  urldate = {2026-11-06}
}