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English word elderberry comes from English elder, English berry
elder (English)
A small tree, Sambucus nigra, having white flowers in a cluster, and edible purple berries. Any of the other species of the genus Sambucus: small trees, shrubs or herbaceous perennials with red, purple, or white/yellow berries (some of which are poisonous).
berry (English)
(botany) A soft fruit which develops from a single ovary and contains seeds not encased in pits.. A coffee bean.. A small succulent fruit, of any one of many varieties.. One of the ova or eggs of a fish. To bear or produce berries.. To pick berries.
elderberry (English)
Elder; a shrub or tree of the genus Sambucus. The small, edible, purplish-black fruit of this plant used in cooking and to flavour drinks etc.