Biquadratic
involving the fourth, but no higher, power of the unknown or variable.
quartic (def 2).
biquadrate.
historical examples
chambers’s twentieth century dictionary (part 1 of 4: a-d) various
outlines of educational doctrine john frederick herbart
encyclopaedia britannica, 11th edition, volume 9, slice 7 various
adjective
of or relating to the fourth power
noun
a biquadratic equation, such as x4 + x + 6 = 0
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diradical.
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- Birectangular
having two right angles.
- Birefringence
double refraction. historical examples encyclopaedia britannica, 11th edition, volume 7, slice 7 various noun another name for double refraction bi’re·frin’gent adj. birefringence (bī’rĭ-frĭn’jəns)