The Collaborative International Dictionary of English v.0.48:

Parabolism \Pa*rab"o*lism\ (p[.a]*r[a^]b"[-o]*l[i^]z'm), n.
   [From Parabola.] (Alg.)
   The division of the terms of an equation by a known quantity
   that is involved in the first term. [Obs.]
   [1913 Webster]