I referenced a horticulture book and found information that provided the missing piece for our puzzle. Let me explain. Most garden plants form flowers. In most cases, the flowers contain female and male reproductive parts in a single flower. The definition applies to the tomato.
Some plants produce flowers, transforming to a bulb, and the bulb is the seed container.
Examples of this kind of vegetation are carrots, radishes, turnips, and broccoli. The definition for a vegetable, mentioned earlier, applies to these plants I just described. Reference Sunset New Western Garden Book .