Diureide :: Diureide (n.) One of a series of complex nitrogenous substances regarded as containing two molecules of urea or their radicals, as uric acid or allantoin. Cf. Ureide..
Monureid :: Monureid (n.) Any one of a series of complex nitrogenous substances regarded as derived from one molecule of urea; as, alloxan is a monureid..
Sulphureity :: Sulphur-bottom (n.) A very large whalebone whale of the genus Sibbaldius, having a yellowish belly; especially, S. sulfureus of the North Pacific, and S. borealis of the North Atlantic; -- called also sulphur whale..
Ureide :: Ureide (n.) Any one of the many complex derivatives of urea; thus, hydantoin, and, in an extended dense, guanidine, caffeine, et., are ureides..