Pinnate

a.
  1. (Bot.) Consisting of several leaflets, or separate portions, arranged on each side of a common petiole, as the leaves of a rosebush, a hickory, or an ash. See Abruptly pinnate, and Illust., under Abruptly.
  2. (Zoöl.) Having a winglike tuft of long feathers on each side of the neck.
    3. Pinnated grouse (Zoöl.),
    the prairie chicken.