Noun soya bean has 2 senses
  1. soy, soybean, soya bean - a source of oil; used for forage and soil improvement and as food
    --1 is a kind of bean, bean plant
    --1 is a part of
     soy, soya, soybean, soya bean, soybean plant, soja, soja bean, Glycine max
  2. soy, soya, soybean, soya bean, soybean plant, soja, soja bean, Glycine max - erect bushy hairy annual herb having trifoliate leaves and purple to pink flowers; extensively cultivated for food and forage and soil improvement but especially for its nutritious oil-rich seeds; native to Asia
    --2 is a kind of legume, leguminous plant
    --2 is a member of Glycine, genus Glycine
    --2 has parts: soy, soybean; soy, soybean, soya bean
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