cooriginal

Adjective

coöriginal (not comparable)

1. Existing together ab initio; equiprimordial.
   • It would doubtless be out of place to enter here into any investigation in regard to the origin of our ideas; but I think it will be apparent, that the notion of continuity is coöriginal with that of personal identity, and therefore, antecedent to argumentation[.]1848, George Clinton Whitlock, Elements of Geometry, Theoretical and Practical, part 1, book 2, § 1, page 63
2. Originating from the same point in space.
   • In operations on lines in space, it is convenient to substitute for some of the given lines other lines, equal, and therefore parallel, to the given ones, but passing through a point in space common to themselves and the other given lines; so that all the lines may be coöriginal.1859 October (pub. 1860 October), John Daniel Runkle (editor), The Mathematical Monthly, volume II, № I, pages 29–31: W.P.G. Bartlett, “The Elements of Quaternions”, part I: “Lines”, § 4