In botanical terms, a berry is a fleshy fruit developed from a single ovary, containing multiple seeds embedded within its pulp. (britannica.com) Bananas fit this definition, whereas strawberries do not. Strawberries are aggregate fruits, meaning they form from multiple ovaries of a single flower, each producing a small seed-like structure on the surface. (ucanr.edu) Other surprising examples of botanical berries include tomatoes, cucumbers, and avocados. (mcgill.ca)