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“aniconic”
aniconic (adjective), more aniconic, most aniconic
A description of things that are symbolic or suggestive rather than representing actual deities: Dr. Black, the anthropologist, studied the various anionic objects of worship or their veneration as seen in primitive religions; for example, anionic trees and rocks were symbolic of gods without representing any actual images of them.
Some religions are opposed to the use or presentation of aniconic icons or idols.