venation
Americannoun
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the arrangement of veins, as in a leaf or in the wing of an insect.
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these veins collectively.
noun
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the arrangement of the veins in a leaf or in the wing of an insect
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such veins collectively
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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.
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The veins of such a system considered as a group.
Other Word Forms
- venational adjective
Etymology
Origin of venation
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In simple venation patterns, one unfortunately placed air bubble could block up to 95% of the venation network, preventing water from flowing through the leaf.
From Science Magazine • Apr. 30, 2024
This Angiosperm Terrestrial Revolution was in part driven by a unique innovation in angiosperm leaves: these present a netted hierarchical venation, which allows angiosperm to fix carbon dioxide in a much more efficient way.
From Science Daily • Apr. 16, 2024
Even the assignment to the subfamily Larentiinae is not entirely secure and is based on a few features like wing venation.
From Science Daily • Nov. 13, 2023
The copperplate lines are so exact they mimic the individual venation of feathers; the neck of a gyrfalcon takes on all the ripply realism of moiréd silk.
From New York Times • Nov. 3, 2023
But with care the leaves can be spread open, and their shape and venation seen.
From Trees Worth Knowing by Rogers, Julia Ellen
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
