#oilseed  any of several seeds that yield oil
  supertype:  #seed  a small hard fruit
  subtype:  #castor_bean  seed of castor-oil plant; source of castor oil
  subtype:  #cottonseed  seed of cotton plants; source of cottonseed oil
  subtype:  #candlenut  seed of candlenut tree; source of soil used in varnishes
  subtype:  #rapeseed  seed of rape plants; source of an edible oil
  subtype:  #linseed__flaxseed  the seed of flax used as a source of oil

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