From Longman Business Dictionaryfeedstockfeed‧stock /ˈfiːdstɒk-stɑːk/ noun [countable]1MANUFACTURINGa main RAW MATERIAL (=a material such as coal or oil in its natural state before being treated in order to make things) used for making products such as plastics and NYLONCoal tar was the feedstock for all kinds of chemicals until it was replaced by oil.2FARMINGfood such as grain given to animals on farmsIts activities included supplying feedstock and seeds, managing the sale of produce and supplying agricultural machinery.