Source : Webster's Revised Unabridged Dictionary (1913)

Hyoscyamus \Hy`os*cy"a*mus\, n. [L., fr. Gr. ?; ? a sow, hog + ?
   a bean.]
   1. (Bot.) A genus of poisonous plants of the Nightshade
      family; henbane.

   2. (Med.) The leaves of the black henbane ({Hyoscyamus
      niger}), used in neuralgic and pectorial troubles.

Source : WordNet®

Hyoscyamus
     n : genus of poisonous herbs: henbane [syn: {genus Hyoscyamus}]