Biquadrate
Pronunciation : Bi*quad"rate
Part of Speech : n.
Etymology : [Pref. bi- + quadrate.] (Math.)
Definition : Defn: The fourth power, or the square of the square. Thus 4x4=16, the square of 4, and 16x16=256, the biquadrate of 4.
Source : Webster's Unabridged Dictionary, 1913