Definition of proficuous in English:

proficuous

adjective

rare
  • Profitable; beneficial, useful.

Origin

Mid 17th century; earliest use found in Robert Callis (c1577–1642), barrister. From post-classical Latin proficuus profitable, advantageous, beneficial, useful + -ous.

Pronunciation

proficuous

/prəˈfɪkjʊəs/