biquadrate

== English == === Etymology === From bi- +‎ quadrate. === Noun === biquadrate (plural biquadrates) (mathematics) The fourth power; the square of a square. === Verb === biquadrate (third-person singular simple present biquadrates, present participle biquadrating, simple past and past participle biquadrated) (transitive, arithmetic) To raise to the fourth power; to determine the result of multiplying by itself three times.