Definition of plumbeous in English:

plumbeous

adjective

Ornithology
  • Of the dull grey colour of lead.

    • ‘The adult Plumbeous Kite is pale ashy grey on the head and upper back.’

Origin

Late 16th century: from Latin plumbeus leaden (from plumbum lead) + -ous.

Pronunciation:

plumbeous

/ˈplʌmbɪəs/