Geom. [Irreg. f. L. crux cross + NODE.] A point on a curve where it crosses itself; a node with two real tangents.
1873. Salmon, Higher Plane Curves, 22. In the first case the tangents are both real … such a point is termed a crunode.
Hence Crunodal a., having a crunode.
1873. Salmon, Higher Plane Curves, 126. Nodal cubics may obviously be subdivided into crunodal and acnodal.
