Definition of rosaceous in English:

rosaceous

adjective

Botany
  • Relating to or denoting plants of the rose family (Rosaceae).

    • ‘This is most clear in rosaceous fruit trees that go dormant in preparation for winter, and not in response to environmental cues.’
    • ‘Peachblossom is a rosaceous plant with five petals.’

Origin

Mid 18th century: from modern Latin Rosaceae (based on Latin rosa rose) + -ous.

Pronunciation:

rosaceous

/rəʊˈzeɪʃəs/