pinnated

pin=nat=ed

WORDNET DICTIONARY

pinnated(s = adj.all) pinnate - (of a leaf shape) featherlike; having leaflets on each side of a common axis; Array

pinnated, a. [L. pinnatus feathered, fr. pinna a feather. See Pin a peg, Pen feather.].

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. [1913 Webster]
Having a winglike tuft of long feathers on each side of the neck. [1913 Webster]

Pinnated grouse (Zoöl.), the prairie chicken.

For further exploring for "pinnated" in Webster Dictionary Online