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semi-centenarian
semi-centenarian n. 
/ˌsɛmiˌsɛn(t)əˈnɛriən/ a person of 50 years of age.
Brit. /ˌsɛmɪsɛntəˈnɛːrɪən/
, /ˌsɛmɪsɛntəˈnɛːrɪən/U.S. /ˌsɛˌmaɪˌsɛn(t)əˈnɛriən/
, /ˌsɛˌmaɪˌsɛn(t)əˈnɛriən//ˌsɛmiˌsɛn(t)əˈnɛriən/ΘΚΠ
the world > people > person > person of specific age > [noun]
one-year-old?1609
cinquanter1611
sexagenariana1646
septuagene1657
quintagenarian1687
threescore1721
septuagenarian1744
centenarian1747
seven-year-old1762
septuagenary1792
centenary1800
nonagenarian1804
sexagenary1814
octogenarian1815
nine-year-old1828
octogenary1828
semi-centenarian1828
quinquagenarian1830
quadragenarian1839
seventeen-year-old1858
70-year-old1870
twenty-firster1912
1828 Lights & Shades Eng. Life II. 36 Off the two semi-centenarians started with a duet.
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as lemmas
- travesties
- travestiment
- travestissement
- travestize
- travesty
- travesty of justice
- travesty performance
- travesty role
- travestying
- traviated
- travisher
- travois
- travois dog
- travois litter
- travois pole
- travois road
- travois sled
- travois trail
- travoises
- travoising
- trawl
- trawl-anchor
- trawl-beam
- trawl-boat
- trawl-buoy