The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster]WordNet (r) 3.0 (2006):
Juglans n 1: type genus of the Juglandaceae [syn: Juglans, genus Juglans]