The term "dissection", in general, refers to the act of breaking down or analysing something into its constituent parts. However, the word can have negative connotations when used in certain contexts like surgery or autopsy. Antonyms of "dissection" would refer to the opposite of breaking down or analysing something, such as "assembly" or "construction" - which implies building or creating something. Other antonyms could be "whole", "intact" or "unbroken" which signify that an object is complete or not divided into parts. Overall, antonyms of "dissection" would describe something as a unified entity, in contrast to the action of breaking it down.