Pīn'nate or Pīn'nā-ted, a.

adjective

[Lat. pinnatus, feathered, from pinna, feather; Fr. pinné.]

  1. (Bot.) Shaped like a feather.
  2. Furnished with fins.

Pinnate leaf (Bot.), a leaf consisting of several leaflets arranged on each side of a common petiole.

A botanical illustration showing three pinnate leaves branching from a stem.
Pinnate Leaves.