Dif″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.