DifformDif"form`\, a. [Cf. F. difforme, fr. L. dif- = dis- + forma form. Cf. Deform.] Irregular in form; -- opposed to uniform; anomalous; hence, unlike; dissimilar; as, to difform corolla, the parts of which do not correspond in size or proportion; difform leaves. The unequal refractions of difform rays. --Sir I. Newton.