A multipole configuration with eight equal charges arranged in a circular pattern.(noun)
Any configuration or analysis having eightfold symmetry.(noun)
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Use "octopole" in a sentence
"If the microwave background at the multipoles is correlated with the geometry and direction of motion of the solar system, and the incoherence manifests via octopole and quadrupole components in a bound universe, then there should be a center of gravity at the center of the visible universe that correlates to the ecliptic."
"What is perhaps not so widely discussed is that two of the lowest multipoles - the quadrupole and octopole - are tightly correlated in the sense that the quadrupole plane and the three octopole planes are aligned."