side dish; supplementary food
Formal or technical term for food that accompanies the main dish, such as vegetables or small portions served alongside rice. In everyday conversation, おかず is more common.
In school lunches, side dishes are provided in addition to the staple food.
栄養バランスを考えて、副食物もきちんと食べましょう。
Considering nutritional balance, let's also eat the side dishes properly.