triangulum
From LSJ
Latin > English
triangulum trianguli N N :: triangle
Latin > German (Georges)
triangulum, ī, n., s. triangulus.
Latin > French (Gaffiot 2016)
triangŭlum, ī, n., triangle : Cic. Nat. 2, 125 ; Plin. 27, 61 ; Quint. 1, 10, 41 || -gŭlus, m., Grom. 101, 3.