3 definitions found From WordNet (r) 2.0 [wn]: Rhamnus noun: type genus of the Rhamnaceae: buckthorns [syn: {genus Rhamnus}] From The Collaborative International Dictionary of English v.0.44 [gcide]: Rhamnus \Rham"nus\, noun [NL., from Gr. "ra'mnos a kind of prickly shrub; cf. L. rhamnos.] (Bot.) A genus of shrubs and small trees; buckthorn. The California {Rhamnus Purshianus} and the European {Rhamnus catharticus} are used in medicine. The latter is used for hedges. From The Collaborative International Dictionary of English v.0.44 [gcide]: Buckthorn \Buck"thorn'\, noun (Bot.) A genus ({Rhamnus}) of shrubs or trees. The shorter branches of some species terminate in long spines or thorns. See {Rhamnus}. {Sea buckthorn}, a plant of the genus {Hippopha["e]}.

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