[vee-ney-shuh n, vuh-]
- the arrangement of veins, as in a leaf or in the wing of an insect.
- these veins collectively.
Origin of venation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for venation
In the terms of venation, these parentheses occur most frequently.Explanation of Terms Used in Entomology
John. B. Smith
Venation of leaves—size and arrangement of veins—is important.The Peaches of New York
U. P. Hedrick
But there is no articulation and no venation, and moreover the wings are not used for flying.The Coming of the Fairies
Arthur Conan Doyle
Compare with a genuine leaf—the shape, margin, and venation.Detection of the Common Food Adulterants
Edwin M. Bruce
The fibro-vascular system in the leaf constitutes the venation.
- the arrangement of the veins in a leaf or in the wing of an insect
- such veins collectively
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 venation
1640s, of plant structures, noun of state from Latin vena "vein" (see vein).
Online Etymology Dictionary, © 2010 Douglas Harper
- The distribution or arrangement of a system of veins, as in an insect's wing or a leaf blade. Patterns of venation in insect wings are often used to identify and differentiate species. In angiosperm plants, the venation of eudicot and magnoliid leaves is generally netted or reticulate, with smaller veins branching out from larger ones in a pinnate or palmate pattern, while that of monocots is parallel, with many veins of similar size running parallel to each other along the length of the plant part. These parallel veins are connected to each other by much smaller cross veins.
- The veins of such a system considered as a group.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.