algebraical, a.
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Of or pertaining to algebra; using algebra; according to the laws of algebra; containing an operation of algebra, or deduced from such operation; as, algebraic characters; algebraical writings; algebraic geometry. [1913 Webster]
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progressing by constant multiplicatory factors; -- of a series of numbers. Contrasted to arithmetical. [PJC]
Algebraic curve, a curve such that the equation which expresses the relation between the coördinates of its points involves only the ordinary operations of algebra; -- opposed to a transcendental curve.