WordReference Random House Unabridged Dictionary of American English © 2026
sul•fu•re•ous
(sul fyŏŏr′ē əs),USA pronunciation adj.
sul•fu′re•ous•ly, adv.
sul•fu′re•ous•ness, n.
- Chemistryconsisting of, containing, or pertaining to sulfur.
- Chemistrylike sulfur, esp. in color.
- Latin sulfureus. See sulfur, -eous
- 1545–55
sul•fu′re•ous•ness, n.