Iowa Code § 163.26: Definition.

For the purposes of this subchapter, “garbage” means putrescible animal and vegetable wastes resulting from the handling, preparation, cooking, and consumption of foods, including animal carcasses or parts. “Garbage” includes all waste material, by-products of a kitchen, restaurant, hotel, or slaughterhouse, every refuse accumulation of animal, fruit, or vegetable matter, liquids or otherwise, or grain not consumed, that is collected from hog sales pen floors in public stockyards. Animals or parts of animals, which are processed by slaughterhouses or rendering establishments, and which as part of the processing are heated to not less than 212 degrees Fahrenheit for thirty minutes, are not garbage for purposes of this chapter.