Here’s where things get silly. Botanically speaking, a fruit is the mature ovary of a flowering plant—the part that contains the seeds. Think apples, tomatoes, peppers, and, yes, cucumbers. By that strict definition, things get weird fast.
A vegetable, on the other hand, isn't a scientific term at all. It's a culinary catch-all for any other edible part of a plant: roots (carrots), stems (celery), leaves (spinach), or flower buds (broccoli). So, where does that leave our crisp, leafy lettuce?
Spoiler alert: Lettuce is a leaf, not a seed-bearing structure. Botanically, it’s 100% a vegetable. It's a leaf you eat before the plant decides to bolt and produce its own little flowers and seeds.
