Lewis Short
Crĕmĕra | Crĕmĕrensis, e (noun F) :
* A small river in Etruria, near Veii, made famous by the heroic death of the Fabii, now La Varca or Valca, Liv. 2, 49 fin.; Ov. F. 2, 205; Gell. 17, 21, 13.—Poet.: Cremerae legio,i. e. the Fabii,Juv. 2, 155.—Hence, , , adj., of Cremera: dies, the day of the disastrous conflict at Cremera (with Alliensis), Tac. H. 2, 91.
Charlton T. Lewis, Charles Short, A Latin Dictionary