Definition of tropaeolaceous in US English:

tropaeolaceous

adjective

Botany
rare
  • Belonging to the genus Tropaeolum or family Tropaeolaceae of Central and South American herbaceous plants.

Origin

Mid 19th century; earliest use found in John Loudon (1783–1843), landscape gardener and horticultural writer. From scientific Latin Tropaeolaceae, family name + -ous.

Pronunciation

tropaeolaceous

/ˌtrəʊpiːəˈleɪʃəs/