- Rhymes: -eɪʃəs
- (botany) Of or pertaining to orchids.
- In keeping with the orchidaceous theme of the wedding, the decorator draped the walls with lavenders and pinks.
- Characterized by ostentatiousness; showy.
- The fashion press regarded her red-carpet attire with derision, calling it orchidaceous and overly designed.
pertaining to orchids