Omphalos and Radial point

Omphalos noun - A thing or place that is of greatest importance to an activity or interest.

Radial point and omphalos are semantically related in center topic. In some cases you can use "Radial point" instead a noun "Omphalos", when it comes to topics like middle point.

Omphalos and radial point are semantically related in center topic. You can use "Omphalos" instead a noun phrase "Radial point", if it concerns topics such as middle point.