Parcellation refers to the process of dividing something into smaller parts or parcels. This term is commonly used in geography and neuroscience but can also be used in other fields where division or partitioning is required. There are different synonyms for the word 'parcellation' such as segmentation, partitioning, fragmentation, separation, division, and subdivision. While these words have similar meanings, they each have their unique nuances and contexts in which they are used. Regardless, these synonyms are very useful in conveying the idea of dividing something into smaller parts for easier comprehension or analysis.