Hypertext Webster Gateway: "Buckthorn"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Buckthorn \Buck"thorn`\, n. (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]}.
From WordNet (r) 1.7 (wn)
buckthorn
n 1: a shrub or shrubby tree of the genus Rhamnus; fruits are
source of yellow dyes or pigments
2: any shrub or small tree of the genus Bumelia
3: an Old World plantain with long narrow ribbed leaves widely
established in temperate regions [syn: {English plantain},
{narrow-leaved plantain}, {ribgrass}, {ribwort}, {ripple-grass},
{Plantago lanceolata}]
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