Lewis Short
(adjective) : sexennis, e, sex-annus
* Of six years, six years old: erus,Plaut. Poen. 4, 2, 80; 5, 2, 27: cervi,Plin. 8, 32, 50, ยง 116: sexenni die,after six years, an interval of six years,Caes. B. C. 3, 20.
Charlton T. Lewis, Charles Short, A Latin Dictionary