Lewis Short
(adjective) = ἑβδοματικός: hebdŏmătĭcus (-mădĭcus), a, um
* Relating to the number seven: septeni et noveni anni, qui hebdomatici a Graecis atque enneatici appellantur, i. e. critical, decisive of one's fate, Firm. Math. 4, 14 med.
Charlton T. Lewis, Charles Short, A Latin Dictionary