Lewis Short
(adjective) : lētĭfer (lēth-), fĕra, fĕrum, letum
* Death-bringing, death-dealing, deadly, fatal (poet.): arcus,Verg. A. 10, 169: ictus,Ov. M. 8, 362: dextra,id. ib. 12, 606: vestis,id. ib. 9, 166: anguis,Stat. Th. 5, 628: certamen,Cat. 64, 390: annus,Verg. A. 3, 139: autumnus,Juv. 4, 57.—In prose: rabies letifer morbus canibus,Col. 7, 12 fin.—Transf.: locus,a place in the body where a wound is fatal, a mortal part,Ov. M. 5, 133.
Charlton T. Lewis, Charles Short, A Latin Dictionary