|1.||See atom an ancient philosophical theory, developed by Democritus and expounded by Lucretius, that the ultimate constituents of the universe are atoms|
|2.||a. any of a number of theories that hold that some objects or phenomena can be explained as constructed out of a small number of distinct types of simple indivisible entities|
|b. Compare holism any theory that holds that an understanding of the parts is logically prior to an understanding of the whole|
|3.||psychol the theory that experiences and mental states are composed of elementary units|
|a stew of meat, vegetables, potatoes, etc.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
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