difformity

from The Collaborative International Dictionary of English v.0.48

Difformity \Dif*form"i*ty\, n. [Cf. F. difformit['e]. See
   {Difform}, {Deformity}.]
   Irregularity of form; diversity of form; want of uniformity.
   [Obs.] --Sir T. Browne.
   [1913 Webster]