Alyssum (&adot_;l&ibreve_;ssŭm), n. [NL., fr. Gr. 'alysson, name of a plant, perh. fr. 'a priv. + lyssa raging madness.] (Bot.) A genus of cruciferous plants; madwort. The sweet alyssum (Alyssum maritimum), cultivated for bouquets, bears small, white, sweet-scented flowers.
[1913 Webster]