tacnode

/ ˈtækˌnəʊd /

noun

1. another name for osculation

Word History and Origins

Origin of tacnode¹

C19: from Latin tactus touch (from tangere to touch) + node

Example Sentences

The cases may be divided into sub-cases, by the consideration of compound singularities; thus when m = 4, n = 6, δ = 3, the three nodes may be all distinct, which is the general case, or two of them may unite together into the singularity called a tacnode, or all three may unite together into a triple point or else into an oscnode.

From Project Gutenberg