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Webster 1828 Edition

pinnate ‎(comparative more pinnate, superlative most pinnate)

Resembling a feather.
(botany) Having two rows of branches, lobes, leaflets, or veins arranged on each side of a common axis

Mimosa is a tree with pinnate leaves.

The trunk is unbranched, often much shortened, and bears a crown of feathery or pinnate fronds.
(zoology) Having a winglike tuft of long feathers on each side of the neck.
the pinnate grouse, or prairie chicken

Terms derived from pinnate

resembling a feather

having two rows of branches, lobes, leaflets or veins arranged on each side of a common axis

having a winglike tuft of long feathers on each side of the neck

pinnāte