The bronze script of character Vegetable is
The top left is a hand, the top right are two leaves of a plant, the bottom is character Wood (tree), here is the plant which may be a tree or small plant. The hand is picking the leaves as vegetable.
The big seal script of the character is
Same as clerical script.
Its Pinyin is Cai4.
菜 means not only vegetables but any real food for meals including meat, eggs, and cooked dishes, but not the snacks, cakes, cookies, etc. Originally, the food you can buy in farmer's market.