The Collaborative International Dictionary of English v.0.48:

Pennate \Pen"nate\, Pennated \Pen"na*ted\, a. [L. pennatus
   feathered, winged, from penna feather, wing.]
   1. Winged; plume-shaped.
      [1913 Webster]

   2. (Bot.) Same as Pinnate.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pennate
    adj 1: having feathered wings