What is the term used to describe the gradual process where microscopic solid particles collide and stick together in the disk?

Answer

Accretion

The process of gradual accumulation where dust grains grow into pebbles, and then into larger bodies called planetesimals through collisions and sticking forces, is known as accretion.

What is the term used to describe the gradual process where microscopic solid particles collide and stick together in the disk?
Originstarplanetsolar systemhypothesis