Prune

n.
German prune (Bot.),
a large dark purple plum, of oval shape, often one-sided. It is much used for preserving, either dried or in sirup.
Prune tree

1. A tree of the genus Prunus (Prunus domestica), which produces prunes.
2. The West Indian tree, Prunus occidentalis.
South African prune (Bot.),
the edible fruit of a sapindaceous tree (Pappea Capensis).