The Collaborative International Dictionary of English v.0.48:

Derivative \De*riv"a*tive\, a. [L. derivativus: cf. F.
   d['e]rivatif.]
   Obtained by derivation; derived; not radical, original, or
   fundamental; originating, deduced, or formed from something
   else; secondary; as, a derivative conveyance; a derivative
   word.
   [1913 Webster]

   2. Hence, unoriginal (said of art or other intellectual
      products.
      [PJC]

   Derivative circulation, a modification of the circulation
      found in some parts of the body, in which the arteries
      empty directly into the veins without the interposition of
      capillaries. --Flint. -- De*riv"a*tive*ly, adv. --
      De*riv"a*tive*ness, n.
      [1913 Webster]