'California buckthorn' definitions:

Definition of 'California buckthorn'

(from WordNet)
noun
Evergreen shrub of western United States bearing small red or black fruits [syn: coffeeberry, California buckthorn, California coffee, Rhamnus californicus]

Definition of 'California buckthorn'

From: GCIDE
  • coffeeberry \coffeeberry\ n. an evergreen shrub of Western U.S. (Rhamnus californicus), bearing small red or black fruits; -- called also the California buckthorn.
  • Syn: California buckthorn, California coffee, {Rhamnus californicus}. [WordNet 1.5]