Definition of uropygium in English:

uropygium

noun

Zoology
  • The rump of a bird, supporting the tail feathers.

    • ‘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.’
    • ‘The extent of white also on the uropygium varies much in individual examples, sometimes spreading down to the thighs.’
    hindmost part, back end, appendage
    View synonyms

Origin

Late 18th century: via medieval Latin from Greek ouropugion.

Pronunciation:

uropygium

/ˌjʊərə(ʊ)ˈpɪdʒɪəm/