Photograph of cucumber vine with fruits, flowers and leaves visible
Cucumbers growing on vines
File:Cucumber BNC.jpg
Photograph of a single cucumber fruit
Scientific classification Template:Edit taxonomy
Binomial name
Template:Str letter/trim sativus

The cucumber (Cucumis sativus) is a widely grown plant in the family Cucurbitaceae. This family also includes squash. A cucumber looks similar to a zucchini (British English: courgette).

To a botanist, cucumbers are biologically fruits even if they are commonly considered vegetables: that is their value as a food. They can be cooked, eaten raw, or pickled.