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Definition of black wattle in English: black wattlenoun Either of two Australian acacias, Acacia binervata, and (now usually) A. mearnsii, which is native to southern Australia but widely grown elsewhere, chiefly as a source of tannin and timber or to prevent soil erosion, in some cases becoming an invasive weed.
Definition of black wattle in US English: black wattlenoun Either of two Australian acacias, Acacia binervata, and (now usually) A. mearnsii, which is native to southern Australia but widely grown elsewhere, chiefly as a source of tannin and timber or to prevent soil erosion, in some cases becoming an invasive weed.
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