cissoid

plural cissoids

1. geometryAny of a family of curves defined as the locus of a point, P, on a line from a given fixed point and intersecting two given curves, C₁ and C₂, where the distance along the line from C₁ to P remains constant and equal to the distance from P to C₂.

   The cissoid of a circle and a line is a conchoid

plural cissoids

1. alternativeAlternative form of cisoid (“4chan slang, derogatory: cisgender person”).

   I feel very similar, I don’t ever see myself with a cissoid and I think there is something beautiful about t4t, and every day I am st4t is this truth reinforced. And I always love fellow bisexuals :}

   2025 August 29, anonymous author, “bi trans men in the sense of strictly t4t?”, in 4chan, /lgbt/