The Collaborative International Dictionary of English v.0.48:

Sambucus \Sam*bu"cus\, n. [L., an elder tree.] (Bot.)
   A genus of shrubs and trees; the elder.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Sambucus
    n 1: elder; elderberry [syn: Sambucus, genus Sambucus]