cubital adjective 4noun 1forms 1 adjective4 •Of or pertaining to the cubit or ulna. •Of or pertaining to the cubitus and/or the areas of the wing next to it. •Measured in cubits. •Of the length of a cubit.towers of that city being so high, that unto men below they appeared in a cubital stature — 1650 noun1 •Synonym of cubitus.Second cubital cell irregularly quadrangular, trapezoid, placed in a direct line with the first and third cubitals — 1865 formscubitals