Most anatomical refers to something that holds a high level of structure, organization, and detail related to anatomy. Antonyms for this phrase would include "least anatomical", "disorganized", "chaotic", "haphazard", "unsystematic", or "unstructured". These antonyms imply a lower degree of organization and structure, usually relating to the lack of detail on anatomical features. When using these antonyms, one might argue that a given object, organism, or anatomical structure shows less detail or organization, thus falling short of the "most anatomical" standard. Overall, antonyms for "most anatomical" usually indicate a lesser level of complexity and detail.