biquadrate
Bi*quad"rate, n. Etym: [Pref. bi- + quadrate.] (Math.) Defn: The fourth power, or the square of the square. Thus 4x4=16, the square of 4, and 16x16=256, the biquadrate of 4.
Bi*quad"rate, n. Etym: [Pref. bi- + quadrate.] (Math.) Defn: The fourth power, or the square of the square. Thus 4x4=16, the square of 4, and 16x16=256, the biquadrate of 4.