plumosity
/pluːˈmɒsɪti/Now chiefly Zoology and Botany
noun
The property or condition of being plumose; featheriness.
Origin
Mid 17th century; earliest use found in Thomas Blount (1618–1679), antiquary and lexicographer. From classical Latin plūmōsus plumose + -ity. Compare Middle French plumeuseté, Italian piumosità.