What is the structure called that is formed when the collapsing cloud flattens into a vast, rotating disk containing raw material for planets?

Answer

Protoplanetary disk

The rapidly spinning, flattened structure resulting from the nebula's collapse is known by scientists as the protoplanetary disk.

What is the structure called that is formed when the collapsing cloud flattens into a vast, rotating disk containing raw material for planets?
Originstarplanetsolar systemhypothesis