01 a. Consisting of several leaflets, or separate portions, arranged on each side of a common petiole, as the leaves of a rosebush, a hickory, or…
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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.) See: Abruptly
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2.
Having a winglike tuft of long feathers on each side of the neck.(Zool.)
Phrases & compounds
Pinnated grouse —
the prairie chicken.