The Collaborative International Dictionary of English v.0.48:

Resultant \Re*sult"ant\, a. [L. resultans, p. pr. : cf. F.
   r['e]sultant.]
   Resulting or issuing from a combination; existing or
   following as a result or consequence.
   [1913 Webster]

   Resultant force or Resultant motion (Mech.), a force
      which is the result of two or more forces acting
      conjointly, or a motion which is the result of two or more
      motions combined. See Composition of forces, under
      Composition.
      [1913 Webster]