Source : Webster's Revised Unabridged Dictionary (1913)

Venation \Ve*na"tion\, n. [L. vena a vein.]
   The arrangement or system of veins, as in the wing of an
   insect, or in the leaves of a plant. See Illust. in Appendix.

Venation \Ve*na"tion\, n. [L. venatio, fr. venari, p. p.
   venatus, to hunt. See {Venison}.]
   The act or art of hunting, or the state of being hunted.
   [Obs.] --Sir T. Browne.

Source : WordNet®

venation
     n 1: (botany) the arrangement of veins in a leaf
     2: (zoology) the system of venous blood vessels in an animal
        [syn: {venous blood system}]