'Sea buckthorn' definitions:
Definition of 'Sea buckthorn'
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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.
[1913 Webster]
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Sea buckthorn, a plant of the genus {Hippopha["e]}.
[1913 Webster]
