Definition of luteous in English:

luteous

adjective

Biology
  • Of an orange-yellow or greenish yellow colour.

    • ‘Just before hatching, the spots disappear, the ground colour becomes pale lemon yellow, and the shell is luteous.’
    • ‘The stromatal surface color is luteous while developing but becomes dull black when fully mature, with only traces of luteous remnants found in places.’

Origin

Mid 17th century: from Latin luteus yellow + -ous.

Pronunciation:

luteous

/ˈl(j)uːtɪəs/