English noun: buckthorn | 
| 1.  | buckthorn (plant) a shrub or shrubby tree of the genus Rhamnus; fruits are source of yellow dyes or pigments | 
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  | Broader (hypernym) | bush, shrub | 
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  | Narrower (hyponym) | alder buckthorn, alder dogwood, bearberry, bearwood, California buckthorn, California coffee, Carolina buckthorn, cascara buckthorn, chittamwood, chittimwood, coffeeberry, indian cherry, red-berry, redberry, Rhamnus californicus, Rhamnus carolinianus, Rhamnus croceus, Rhamnus frangula, Rhamnus purshianus | 
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  | Part holonym | buckthorn berry, yellow berry | 
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  | Member meronym | genus Rhamnus, Rhamnus | 
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| 2.  | buckthorn (plant) any shrub or small tree of the genus Bumelia | 
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  | Broader (hypernym) | bush, shrub | 
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  | Narrower (hyponym) | black haw, Bumelia lanuginosa, Bumelia lycioides, chittamwood, chittimwood, false buckthorn, mock orange, shittim, shittimwood, shittimwood, southern buckthorn | 
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  | Member meronym | Bumelia, genus Bumelia | 
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| 3.  | buckthorn (plant) an Old World plantain with long narrow ribbed leaves widely established in temperate regions | 
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  | Synonyms | English plantain, narrow-leaved plantain, Plantago lanceolata, ribgrass, ribwort, ripple-grass | 
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  | Broader (hypernym) | plantain | 
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