The Collaborative International Dictionary of English v.0.48:

nonmechanical \nonmechanical\ adj.
   1. not using a mechanism. Opposite of mechanical. [Narrower
      terms: nonmechanistic] [Narrower terms: {unmechanized ]
      [WordNet 1.5]

   2. Not having an aptitude to work with machinery; without
      mechanical skills; -- of persons.

   Syn: unmechanical.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

nonmechanistic \nonmechanistic\ adj.
   not determined by a mechanical process; partly resulting from
   a creative process.
   [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

nonmechanistic
    adj 1: not mechanistic