quadragenarian adjective & noun.
[kwɒdrǝdʒɪ'nɛ:rɪǝn] M19.[Late Latin quadragenarius, from Latin quadrageni distrib. of quadraginta forty: see -ARIAN.](A person who is) forty years old or between forty and fifty.
■ quadragenarious adjective M17. [TahlilGaran] English Dictionary ▲