alation
/əˈleɪʃn/Chiefly Zoology and Palaeontology
noun
Winged condition; the form and arrangement of wings.
Origin
Early 19th century; earliest use found in James Francis Stephens (1792–1852), entomologist. From French alation from post-classical Latin alation-, alatio from classical Latin ālātus + -iō. With the use in botany compare foliation.