What are the definitions of bowls and plates?

Bowl is a necessary daily eating utensil for people. The origin of bowl is currently unknown, but it can be traced back to the clay pottery bowl of the Neolithic Age. Its shape is not much different from today's, that is, the mouth is large and the bottom is small, the mouth is wide and the bottom is small. Narrow, with a bowl foot at the bottom. The height is generally half the diameter of the mouth rim. Most are round, rarely square. What keeps changing are the materials, craftsmanship and decoration methods. The general purpose is to hold food. Bowls can be held with hands because they are smaller than pots and bowls. The shape is wide at the top and narrow at the bottom, which is unstable when placed on flat ground. Plate:
Most of them are ceramic products, but there are also metal products
During the Qing Dynasty, it was introduced from the West and later became one of the main tools for serving food in my country.
When serving food on a plate, it is more convenient to pick up the food and dissipate heat better.
Later, plates were introduced to various countries one after another, basically covering six continents except Antarctica. The difference between bowls and plates is obviously the shape, and the function. One is for serving rice, and the other is for serving vegetables.