a. Geom. [f. CON- together + CYCLIC (f. Gr. κύκλος circle).] a. Lying (as a series of points) on the circumference of one circle. b. Of two or more conicoids: Giving circular sections when cut by the same system of parallel planes. Also absol. as sb.
1871. H. M. Jeffery, in Q. Jrnl. Math., IX. 225 (title), On Concyclic Conicoids.
1874. Salmon, Analyt. Geom. 3 Dimens., Contents, § 104. Forms of Equations of Concyclic surfaces. [Text] § 104. Surfaces whose coefficients of x1, y2, z3, differ only by a constant, have the same planes of circular section.
1884. C. Smith, Solid Geom. (1886), § 173. A system of confocal conicoids reciprocates into a system of concyclic conicoids. Ibid., § 174. The points of contact of the plane with the concyclics which touch it.
