WordReference Random House Unabridged Dictionary of American English © 2026
or•chi•da•ceous
(ôr′ki dā′shəs),USA pronunciation adj.
- Plant Biologybelonging to the plant family Orchidaceae. Cf. orchid family.
- Neo-Latin Orchidace(ae) (see orchid, -aceae) + -ous
- 1830–40