normālis — Lewis & Short
normālis, e, adj.norma,
I made according to the square:
normalis angulus,a right angle, Quint. 11, 3, 141:
virgula,a square, Manil. 2, 289: rigores, Aggen. ap. Comm. in Frontin. p. 53 Goes.—Hence, adv.: normālĭter, according to the square, Hyg. de Limit. p. 168 and 176 Goes. —
B In a straight line, directly, Amm. 20, 3, 11.