Definition of rosacean in US English:

rosacean

adjective

Botany
  • Rosaceous.

noun

Botany
  • A plant of the family Rosaceae; a rosaceous plant.

Origin

Mid 19th century. From scientific Latin Rosaceae, order name + -an.

Pronunciation

rosacean

/rə(ʊ)ˈzeɪʃn/