1: Manufactured food is processed food. That is packaged or canned. According to wiki it says that early food was made by salting, curing, curdling, drying, pickling, and smoking.
2: Which definition do you need? There is:
1. Something having analogy to something else.
2. An organ or part analogous to another.
3. One of a group of chemical compounds similar in structure but different in respect to elemental composition.
^ credit goes to dictionarycom for definitions