feedstock

noun

1. (countable, uncountable)Any bulk raw material constituting the principal input for an industrial process.

   “Bio-materials may be substituted for petrochemical feedstocks as petroleum prices rise.”

   “The filtered extract of the mash is the feedstock for the fermenter.”

   “In 2006, about 6 percent of the world's crude oil production was used in non-energy applications, primarily as a petrochemical feedstock.”