Why isn't prune juice called plum juice?

Prune juice is made from different varieties of plums than the normal plums you get at a grocery store. These varieties are called "prunes". The main difference is that they are freestone plums: the pit is easier to remove. read more

Because until the prune marketers came to think that the name "prune" was off-putting, the name for dried plums in English was "prune," similar to the way dried grapes are known as "raisins.". If the marketers continue to have their way, it will be known as "plum juice" soon enough. read more

This might sound like a strange question, comes from working too many nights stacking shelves I think, but I have always wondered why prune juice is called prune juice and not plum juice. read more