- resembling a feather, as in construction or arrangement; having parts arranged on each side of a common axis: a pinnate branch; pinnate trees.
- Botany. (of a leaf) having leaflets or primary divisions arranged on each side of a common stalk.
Often pin·nat·ed [pin-ey-tid] /ˈpɪn eɪ tɪd/.
Origin of pinnate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for pinnate
The leaves are large, pinnate, shining, and very smooth and irregular.On the Banks of the Amazon
Each apophysis is pinnate with opposite pinnul, or crossed at right angles by three to six parallel transverse rods.
The leaves are pinnate, and they unroll, when they expand, like those of the ferns.Botany for Ladies
Medium-sized, fronds thin, oblong-lanceolate, 2-3 pinnate or pinnatifid.
Small, fronds 1-2 pinnate, fruit-dots linear-oblong, often confluent.
- like a feather in appearance
- (of compound leaves) having the leaflets growing opposite each other in pairs on either side of the stem
C18: from Latin pinnātus, from pinna feather
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for pinnate
1727, from Latin pinnatus "feathered, winged," from pinna "feather, wing" (see pin (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper
- Having parts or divisions arranged on each side of a common axis in the manner of a feather. Ash, hickory, and walnut trees have pinnate leaves.
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