The Collaborative International Dictionary of English v.0.48:

Picea \Pic"e*a\, n. [L., the pitch pine, from pix, picis,
   pitch.] (Bot.)
   A genus of coniferous trees of the northen hemisphere,
   including the Norway spruce and the American black and white
   spruces. These trees have pendent cones, which do not readily
   fall to pieces, in this and other respects differing from the
   firs.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Picea
    n 1: a genus of temperate and Arctic evergreen trees (see
         spruce) [syn: Picea, genus Picea]