Are Tomatoes and Cucumbers Vegetables?

Neither tomatoes nor cucumbers are vegetables — they're fruits. The debate about whether a tomato is a fruit or not actually made it to the Supreme Court in 1883 in Nix v Hedden. The tomato was declared to be botanically a fruit but for all other purposes a vegetable.

More on fruits and vegetables:

The biggest difference between fruits and vegetables is the presence of seeds. Tomatoes, cucumbers, pumpkins and peppers all have seeds, so they are all technically fruits.

The strawberry is actually not a berry. It is closely related to the rose family, and the edible berry part is actually what is known as a "false fruit." The true berry of the strawberry is the little black specks that contain the seeds.

Eggplants and avocados are technically classified as berries.