venation

[ vee-ney-shuh n, vuh- ]

/ viˈneɪ ʃən, və- /

SEE MORE SYNONYMS FOR venation ON THESAURUS.COM

noun

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

these veins collectively.

Nearby words

Origin of venation

1640–50; < Latin vēn(a) vein + -ation

Related formsve·na·tion·al, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for venation

The compound leaves correspond to these modes of venation; they are either pinnately or palmately compound.
Outlines of Lessons in Botany, Part I; From Seed to Leaf|Jane H. Newell
Remove all or nearly all the scales from a wing and note the arrangement of the veins (venation).
Elementary Zoology, Second Edition|Vernon L. Kellogg
The venation is peculiar, and the disposition of the sori depends mainly on the peculiarities of the venation.
Beautiful Ferns|Daniel Cady Eaton
It is not in all cases easy to trace the origin and true nature of the ascidium, as the venation is sometimes obscure.
Vegetable Teratology|Maxwell T. Masters

The venation is useful as pointing out the number of leaves which constitute a gamosepalous calyx.
Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5|Various

British Dictionary definitions for venation

venation

/ (viːˈneɪʃən) /

noun

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

such veins collectively

Derived Formsvenational, 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

Word Origin and History for venation

venation

1640s, of plant structures, noun of state from Latin vena "vein" (see vein).

Science definitions for venation

venation

[ vē-nā′shən ]

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.