Definition of octadic in English:

octadic

Pronunciation /ɒkˈtadɪk/

adjective

rare
  • Of or relating to an octad or octads. "octadic surface" noun Geometry a quartic surface having eight nodes which can be thought of as the intersections of three quadric surfaces.

Origin

Late 19th century; earliest use found in Proceedings of the London Mathematical Society. From octad + -ic.