semisupercentenarian

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

semisupercentenarian (plural semisupercentenarians)

1. (uncommon) A person between 105 and 109 years old.
   • Stacy L. Andersen et al. (2012 January 4) “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: “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).”