Final answer:
Accretion is the process where condensed nebula gases adhere to dust particles, forming small clumps called planetesimals which accumulate more materials to grow into larger bodies like planets. This process is vital in stellar formation.
Step-by-step explanation:
In the context of stellar formation, the process described in the question is known as accretion. When condensed nebula gases adhere to dust particles, they form small clumps called planetesimals. These planetesimals continue to grow through further accretion, eventually forming larger bodies such as planets.