Pinnate /(?)/

Pin·nate

Pinnate

a.
  1. 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. (Bot.)
  2. Having a winglike tuft of long feathers on each side of the neck. (Zool.)

Phrases & Compounds
Pinnated grouse
the prairie chicken.