Adventitious(redirected from Adventive root)
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ADVENTITIOUS, adventitius. From advenio; what comes incidentally; us adventitia bona, goods that, fall to a man otherwise than by inheritance; or adventitia dos, a dowry or portion given by some other friend beside the parent.
A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.