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| any of various trees of the genera Eucalyptus or Liquidambar or Nyssa that are sources of gum | |||
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| deciduous tree of the Amazon and Orinoco Rivers having leathery leaves and fragrant yellow-white flowers; deciduous tree of the Amazon and Orinoco Rivers having leathery leaves and fragrant yellow-white flowers; it yields a milky juice that is the chief source of commercial rubber ❲Hevea brasiliensis❳ |