• WordNet 3.6
    • adj pinnate (of a leaf shape) featherlike; having leaflets on each side of a common axis
    • ***
Webster's Revised Unabridged Dictionary
    • Pinnate (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.
    • Pinnate (Zoöl) Having a winglike tuft of long feathers on each side of the neck.
    • ***
Century Dictionary and Cyclopedia
    • pinnate Shaped like a feather, or resembling a feather in Structure. In botany, noting leaves of such form. Also pennate.
    • pinnate In zoology:
    • pinnate Feathered; pinnated.
    • pinnate Provided with a pinna or pinnæ; having wings, fins, or similar parts.
    • ***
Chambers's Twentieth Century Dictionary
    • adjs Pinnate shaped like a feather: furnished with wings or fins
    • ***


Webster's Revised Unabridged Dictionary
L. pinnatus, feathered, fr. pinna, a feather. See Pin a peg, Pen feather
Chambers's Twentieth Century Dictionary
L. pinna, a feather, dim. pinnula.


In literature:

The leaflets of the plumula are pinnate.
"Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by William Griffith
Leaf partially twice pinnate.
"Handbook of the Trees of New England" by Lorin Low Dame
The leaves are large, pinnate, shining, and very smooth and irregular.
"On the Banks of the Amazon" by W.H.G. Kingston
Laws have been made for the protection of the pinnated grouse, or prairie chicken, and others of their tribe.
"Ohio Arbor Day 1913: Arbor and Bird Day Manual" by Various
The leaves are bi-pinnate.
"Journeys Through Bookland, Vol. 7" by Charles H. Sylvester
There is also the pinnated or Cupid Grouse.
"The Western World" by W.H.G. Kingston
This is a slightly smaller and darker variety of the Pinnated Grouse.
"The Bird Book" by Chester A. Reed
The tree sends enormous branches from near the ground, the pinnate leaves of which produce this fiber.
"Asparagus, its culture for home use and for market:" by F. M. Hexamer
The tree terminates in a crown of graceful waving pinnate leaves.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6" by Various
Leaves once-pinnately compound 50b, in =ROSACEAE=, p. 55.
"The Plants of Michigan" by Henry Allan Gleason
The leaves are pinnate, and on young trees grown in good soil are frequently three feet long.
"Trees and Shrubs for English Gardens" by Ernest Thomas Cook
Three sorts of pinnate leaves are here given.
"The Elements of Botany" by Asa Gray
The origin is by two distinct heads, each of which is pinnate.
"Myology and Serology of the Avian Family Fringillidae" by William B. Stallcup
Septa numerous, arranged pinnately with regard to four principal septa.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2" by Various
Perhaps they were "Prairie hens" (pinnated grouse).
"Cape Cod" by Henry D. Thoreau
The leaves are brownish, pinnate; their segments imbricated.
"Lachesis Lapponica" by Carl von Linné
Their light pinnate foliage has disappeared like flax before the flame.
"The Headless Horseman" by Mayne Reid
A slender-stemmed palm, with regular pinnate leaves and long, narrow leaflets.
"The Nut Culturist" by Andrew S. Fuller
Leaves alternate, pinnate or pinnately parted.
"The Manual of the Botany of the Northern United States" by Asa Gray
From under our very feet, almost brushing our faces, the beautiful pinnated grouse of the prairies left their cover, and us also.
"Buffalo Land" by W. E. Webb

In poetry:

The poplar, all its catkins shed,
With balsam-scented leaves is hung,
The ash with pinnate fronds is spread;
The blossom red
Upon the elm is fading fast /
The emerald studs among.
"Leaf-Time" by David Gow