tertiusdecimus
tertĭus-dĕcĭmus (-dĕcŭmus), a, um,
- num. ord. adj., the thirteenth: dies, Cels. 3, 4 med.: mense, Col. 6, 36, 2; Plin. 8, 44, 69, § 171: tertiadecuma legio, Tac. A. 1, 37.
tertĭusdĕcĭmus, -adĕcĭma, -umdecimum, treizième : Cels. Med. 3, 4 ; Col. Rust. 6, 36, 2 ; Plin. 8, 171.