The rump of a bird, supporting the tail feathers.
hindmost part, back end, appendageView synonyms
- ‘The extent of white also on the uropygium varies much in individual examples, sometimes spreading down to the thighs.’
- ‘The nape, shoulder, and upper surface of wings are also thickly strewn with white feathers; back and uropygium have likewise many white patches, but getting fewer towards the latter portion.’
Late 18th century: via medieval Latin from Greek ouropugion.