powder-down feather (English, noun)
expansion: powder-down feather (countable and uncountable, plural powder-down feathers)
Senses:
topics: biology
natural-sciences
ornithology
glosses: A down feather which grows continuously and disintegrates, forming fine particles of keratin, which appear as a powder, or "feather dust".
tags: countable
uncountable
Forms:
form: powder-down feathers
tags: plural