Latin pinnātusfeatheredfrompinnafeatherpet- in Indo-European roots
American Heritage Dictionary of the English Language, 5th Edition
From Latinpinnātus (“feathered"), from pinna (“feather")
Pinnate Sentence Examples
Its broad pinnate tropical leaf was pleasant though strange to look on.
P. phegopteris (beechfern) is a graceful species with a black, slender root-stock, from which the pinnate fronds rise on long stalks, generally about 12 in.
When the pinnate leaf of a Mimosa pudica, the so-called sensitive plant, is pinched or struck, the leaf droops rapidly and the leaflets become approximated together, so that their upper surfaces are in contact.
In these plants the laminae or blades of the leaves are pinnate or bipinnate and are produced at the FIG.
In Lathyrus Aphaca and some other plants the true pinnate leaves are abortive, the petiole forms a tendril, and the stipules alone are developed, perform ing the office of leaves.