Rhubarb (noun)

1. A plant of the dock family, which is grown for its edible pinkish-green stems.
2. The stem of this plant, which is typically stewed with sugar and used as a fruit or in pies and other sweet dishes.

Origin:

Middle english: from old french reubarbe, via latin from greek rha barbaron, literally "barbarian rhubarb", translating medieval latin rha tartarica "tartar rhubarb".

Examples:

1. Rhubarb is a popular ingredient in pies and jams.
2. She made a rhubarb crisp for dessert.
3. Rhubarb is a vegetable, but is often used as a fruit.
4. The rhubarb was picked fresh from the garden.
5. He enjoyed eating rhubarb with sugar and cream.