(mathematics) Of a polynomial expression, involving only the zeroth, second, and fourth powers of a variable, as x⁴ + 3x² + 2. Sometimes extended to any expression involving the biquadrate or fourth power (but no higher powers), as x⁴ − 4x³ + 3x² − x + 1.
noun
(mathematics) A biquadratic equation.
quadribasic
quadribasic
adj
(chemistry) tetrabasic
quebrachine
quebrachine
noun
An alkaloid, probably identical to yohimbine, from the quebracho tree
