[ vee-ney-shuhn, vuh- ]
/ viˈneɪ ʃən, və- /


the arrangement of veins, as in a leaf or in the wing of an insect.
these veins collectively.

Origin of venation

1640–50; <Latin vēn(a) vein + -ation


ve·na·tion·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for venation

British Dictionary definitions for venation

/ (viːˈneɪʃən) /


the arrangement of the veins in a leaf or in the wing of an insect
such veins collectively

Derived forms of venation

venational, adjective
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

Scientific definitions for venation

[ vē-nāshən ]

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.