fratricidium
From LSJ
ἀκίνδυνοι δ' ἀρεταὶ οὔτε παρ' ἀνδράσιν οὔτ' ἐν ναυσὶ κοίλαις τίμιαι → but excellence without danger is honored neither among men nor in hollow ships
Latin > English (Lewis & Short)
frātrĭcīdĭum: ii, n. fratricida,
I the murder of a brother. fratricide (eccl. Lat.), Tert. Monog. 4; Hier. adv. Jovin. 1, 14; Salv. de Gub. Dei, 1, p. 25.
Latin > French (Gaffiot 2016)
frātrĭcīdĭum, ĭī, n., meurtre du frère, fratricide : Tert. Mon. 4.