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English to English noun
| 1 |
(psychology) a theory that reduces all mental phenomena to simple elements (sensations and feelings) that form complex ideas by association |  | source: wordnet30
| 2 |
(chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles | | Example: the ancient Greek philosophers Democritus and Epicurus held atomic theories of the universe
source: wordnet30
| 3 |
The doctrine of atoms. See Atomic philosophy, under Atomic. | | source: webster1913
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