quincentenarian UK /ˌkwɪn.sɛn.təˈnɛəɹi.ən/US /ˌkwɪn.sɛn.təˈnɛɹi.ən/ noun1 •One who or that which is between 500 and 599 years old.Upon waking, Ornaith’s thoughts went to this year’s celebrated quincentenarian, Christopher Columbus. — 1992 formsquincentenarians
