01 a. Of or pertaining to the biquadrate, or fourth power.
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1.
Of or pertaining to the biquadrate, or fourth power.(Math.)
Phrases & compounds
Biquadratic equation —
an equation of the fourth degree, or an equation in some term of which the unknown quantity is raised to the fourth power.
Biquadratic root of a number —
the square root of the square root of that number. Thus the square root of 81 is 9, and the square root of 9 is 3, which is the biquadratic root of 81. Hutton.