Source : Webster's Revised Unabridged Dictionary (1913)

Juglans \Jug"lans\, n. [L., walnut.] (Bot.)
   A genus of valuable trees, including the true walnut of
   Europe, and the America black walnut, and butternut.

Source : WordNet®

Juglans
     n : type genus of the Juglandaceae [syn: {genus Juglans}]