Definition of "oilseed"

oilseed

noun
usually uncountable, plural oilseeds
1. The seed of any of several plants which are used commercially as a source of vegetable oil.
  Quotations
  Ukraine’s exports of grain and oilseeds have mostly stopped and Russia’s are threatened.
  2022 May 19, “The coming food catastrophe”, in The Economist‎
2. The plant that yields such seed.