The Collaborative International Dictionary of English v.0.48:

Spatula \Spat"u*la\ (?; 135), n. [L. spatula, spathula, dim. of
   spatha a spatula: F. spatule. See Spade for digging.]
   An implement shaped like a knife, flat, thin, and somewhat
   flexible, used for spreading paints, fine plasters, drugs in
   compounding prescriptions, etc. Cf. Palette knife, under
   Palette.
   [1913 Webster]

WordNet (r) 3.0 (2006):

spatula
    n 1: a turner with a narrow flexible blade
    2: a hand tool with a thin flexible blade used to mix or spread
       soft substances

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "spatula":
   air brush, art paper, brush, camera lucida, camera obscura, canvas,
   chalk, charcoal, chisel, crayon, drawing paper, drawing pencil,
   drier, easel, fixative, ground, lay figure, mallet, maulstick,
   medium, modeling clay, paint, paintbrush, palette, palette knife,
   pastel, pencil, pigments, point, scratchboard, siccative,
   sketchbook, sketchpad, solder, soldering iron, spray gun, stump,
   varnish