septemdecim
From LSJ
Theocritus, Idylls, 30.3
Latin > English (Lewis & Short)
septemdĕcim: v. septendecim.
Latin > French (Gaffiot 2016)
septemdĕcim ou septendĕcim, ind., dix- sept : Cic. Verr. 2, 5, 124 ; Tac. Ann. 13, 6.
Latin > German (Georges)
septemdecim, Num. (septem u. decem), siebzehn, Cic. u.a. (seltener als septem et decem u. dgl., s. septemno. I).