the separation and identification of the parts of a whole

assessment, diagnosis, evaluation, examination, inspection, investigation, muster, scrutiny

arrangement, assortment, cataloging (or cataloguing), categorization, classification, codification, indexing

enumeration, inventory, itemization, tabulation

division, reduction, segmentation, separation, subdivision

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Anatomy Synonyms, Anatomy Antonyms | Merriam-Webster Thesaurus