Lewis & Short

cŭbĭtālis, e, adj. [cubitum], pertaining to the elbow; hence, as a measure, a cubit long, Liv. 24, 34, 9; Plin. 12, 12, 26, § 45; Pall. Febr. 18, 6 al.: simulacrum cubitali majus, Suet. Galb. 4.