- A former genus of leguminous plants, consisting of a single species, <em>S. hispida.</em> now classed as <em>Glycine Soja.</em> Also written <internalXref urlencoded="Soya">Soya</internalXref>. See <internalXref urlencoded="soy">soy</internalXref>.
- An Asiatic leguminous herb (<spn>Glycine max</spn>, formerly <spn>Glycine Soja</spn>) the seeds of which (called soy beans) are used in preparing the sauce called soy. Called also <altname>soya</altname>.
- Dated form of <xref>soya</xref>.
- 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