venation
Concise Oxford English Dictionary © 2008 Oxford University Press:
venation /vɪˈneɪʃ(ə)n/
▶noun Biology the arrangement of veins in a leaf or in an insect's wing.
■ the system of venous blood vessels in an animal.
– derivatives
venational adjective.
venational adjective.
'venation' also found in these Oxford entries:

