Definition of "indumentum" []

• In botany, any hairy covering or pubescence which forms a coating. (noun)
• In ornithology, plumage; a bird's feathers, collectively considered. (noun)

The Century Dictionary (Public Domain)

• "This evergreen oak possesses leathery leaves with a dense, felt-like indumentum on the undersurface."
• "Nec mora, rex illam emancipauit, et insuper Dei famulo suum indumentum donauit."
• "The differentiating qualities relate to the shape and indumentum of the leaves."