👉 In geometry, a "protocone" is a type of cone that is not simply connected. It has two distinct ends, one for each end of its base. This means that there are two separate curves in its surface, which makes it different from other cones like a parabola or an ellipse. The term "protocone" comes from the Greek word "protos," which means "one part of" and "cone," which is a type of polygon with one vertex at the
