I think I already knew that tomatoes were berries. But avocados? Apparently so!

In botany, a berry is a fleshy fruit produced from a single flower containing one ovary. Under that definition, bananas, cucumbers, and eggplants are also berries.

But many of the fruit we commonly called berries, e.g. raspberries and blackberries, are not. They are aggregate or compound fruits containing seeds from different ovaries of a single flower, with the individual “fruitlets” joined at maturity to form the complete fruit.

Berrrrrrrry interesting.