semiform noun2 •A partial or imperfect form.The semiform is covered with a thermoplastic bar preheated in a special chamber up to superelastic state . — 1990 •A crystal structure that is more elaborate than the simplest (primitive) form but which does not include all the faces and symmetry elements characteristic of the full crystal system.This semiform π (312) is again to be observed on crystal No. 13, though it is there represented by only a single face. — 1882 formssemiforms
