WordNet (r) 3.0 (2006):

Christmas berry
    n 1: spiny evergreen shrub of southeastern United States having
         spreading branches usually blue or mauve flowers and red
         berries [syn: Christmasberry, Christmas berry, Lycium
         carolinianum]
    2: ornamental evergreen treelike shrub of the Pacific coast of
       the United States having large white flowers and red
       berrylike fruits; often placed in genus Photinia [syn:
       toyon, tollon, Christmasberry, Christmas berry,
       Heteromeles arbutifolia, Photinia arbutifolia]