The question 'Is cucumber a fruit or a vegetable?' is a common one. At Tommies, we chiefly look at the answer to this question from a health perspective. Fruit. One respondent said: “Everyone knows tomatoes are fruit, but some of the others In an avocado or olive, the seed is the stone at the centre. In botany, a fruit is the seed-bearing structure in flowering plants (also known as angiosperms) .. Coconut fruits can float thousands of miles in the ocean to spread seeds. Many "vegetables" in culinary parlance are botanical fruits, including bell pepper, cucumber, eggplant, green bean, okra, pumpkin, squash, tomato, and.