# 1911 Encyclopædia Britannica/Biquadratic

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←Bipont Editions | 1911 Encyclopædia Britannica, Volume 3Biquadratic |
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See also Biquadratic on Wikipedia; Biquadratic at Wiktionary; and our 1911 Encyclopædia Britannica disclaimer. |

**BIQUADRATIC** (from the Lat. *bi-*, *bis*, twice, and *quadratus*, squared). In mathematics, the biquadratic power or root of a quantity is its fourth power or root (see ALGEBRA); a biquadratic equation is an equation in which the highest power of the unknown is the fourth (see EQUATION: *Biquadratic*).