noun
Meaning 1
A special type of down that occurs in a few groups of apparently unrelated birds. In some species, the tips of the barbules on the feathers disintegrate, forming fine particles of keratin; in others, powder grains come from cells that surround the barbules of growing feathers.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
Examples
- All parrots have powder down.
Meaning relationships
Synonyms: none provided
Antonyms: none provided