Grapefruit (noun)

A large, round citrus fruit with a thick, bitter rind and juicy, somewhat bitter flesh.

Origin:

From the name of the fruit which is thought to have been so-named because it grows in clusters like grapes.

Examples:

1. She cut a grapefruit in half and scooped out the flesh with a spoon.
2. Grapefruit is a good source of vitamin C.
3. The grapefruit juice was too bitter for her taste.
4. The grapefruit diet is a popular weight loss plan.
5. The grapefruit tree was full of ripe fruits.