Every year someone at the lunch table announces that a tomato is actually a fruit, and every year someone else says that’s ridiculous, because nobody puts tomato in fruit salad. I want to settle it, and then argue that both of them are right, and that the argument teaches us something more useful than the answer.
Start with the botanist. To a scientist who studies plants, a fruit has a precise meaning: it is the part of a flowering plant that grows from the ovary of a flower, after the flower is pollinated, and it holds the seeds. The petals fall, the ovary swells, and the seeds develop inside it. That’s all a fruit is. It’s the plant’s way of packaging its seeds, often in something tasty, so that animals eat it and carry the seeds somewhere new. Look at the end of a tomato opposite the stalk and you can often see the small scar where the flower was.
By that definition, a tomato is obviously a fruit. So is a cucumber. So is a brinjal, a capsicum, a pea pod, a pumpkin, a chilli and every bhindi in the sabzi. They all grow from flowers, and they all have seeds inside. In fact, a tomato is a particular kind of fruit, a berry: a fleshy fruit grown from a single ovary, with the seeds embedded in the flesh. This is where botany gets mischievous, because by the same rule a banana is a berry too, and a strawberry isn’t. The strawberry’s red flesh grows from the base of the flower, not from its ovary, and the little “seeds” dotted over its surface are each a tiny separate fruit, with its own seed inside.
Now the cook. “Vegetable” is not a botanical word at all. There is no scientific category for it. It’s a kitchen word, and it means something like “the parts of plants we cook in savoury dishes”: roots like carrots, leaves like palak, stems, bulbs, flowers like cauliflower, and also some fruits, like tomatoes and bhindi, that aren’t sweet. The cook is sorting plants by taste and use, and for that purpose, a tomato belongs with the onions, not with the mangoes.
This argument once went all the way to the Supreme Court of the United States. In 1893, tomato importers were taxed at the higher rate for vegetables, and they argued that tomatoes were fruits. The court agreed that botanically they were, and then ruled that for the purposes of trade and tax, they were vegetables, because that’s how ordinary people bought, cooked and ate them. Both sides were right. They had simply been asking different questions.
And that’s the real lesson. We tend to think a word should have one true meaning, and that one side of an argument must have it. But in science, a definition is a tool built for a job. The botanist’s definition is built to explain how plants reproduce, and it does that beautifully: it groups the tomato with the mango because both are seed packages that grew from flowers. The cook’s definition is built to tell you what goes in the curry, and it does that beautifully too. Neither is wrong. They’re answers to different questions.
So, the next time someone at the lunch table starts this argument, don’t take sides. Ask which question they’re answering. Is it “how did this grow?”, or “what do I do with it?” The tomato is a fruit. It’s also a vegetable. And it’s definitely not going in the fruit salad.