Link to this page adjective: Of or regarding the 4th degree. Of a polynomial expression, involving only the 2nd and 4th capabilities of a variable, as x4 + 3x2 + 2. Sometimes extended to any expression relating to the 4th energy of adjustable (but no higher abilities), as x4 − 4x3 + 3x2 − x + 1. Of or regarding the biquadrate, or fourth energy. of or regarding the 4th energy View More noun: An algebraic equation associated with 4th level. A biquadratic equation. A biquadrate. A biquadratic equation. In mathematics, the fourth power, arising from the multiplication of a square quantity or amount alone. an equation of this fourth degree an algebraic equation of the fourth degree a polynomial of the fourth degree View More others: Containing or referring to a fourth power, and/or square of a square; quartic. Related Sources Definition for "biquadratic" Sentence for "biquadratic" He however extended and developed it,… View More Synonym for "biquadratic" Hypernym for "biquadratic" Cross Reference for "biquadratic" Etymologically Related for "biquadratic"