pinnate(redirected from Tetrapinnate)
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Resembling a feather in having parts or branches arranged on each side of a common axis: pinnate leaves; pinnate gills.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
pinnate(of compound leaves) made up of leaflets arranged in two rows on opposite sides of the axis, or RACHIS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005