double point

noun — 2 senses

noun

A symbol, such as a colon, composed of two points.

As with the printers a full-point, a double point or colon, and a triple point, are each of them single types, the matter was still more simplified.1882, Henry Bradshaw, Address at the opening of the fifth annual meeting of the Library Association:

Geometry, Mathematics, Sciences A point on a curve at which there are two tangents (because it touches itself, or has a cusp).

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.