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We found 9 dictionaries with English definitions that include the word optical illusions: Click on the first link on a line below to go directly to a page where "optical illusions" is defined. General (6 matching dictionaries) optical illusions: Collins English Dictionary [home, info] optical illusions: Vocabulary.com [home, info] optical illusions: Cambridge Advanced Learner's Dictionary [home, info] optical illusions: Wiktionary [home, info] Optical Illusions: Wikipedia, the Free Encyclopedia [home, info] Optical illusions: Dictionary/thesaurus [home, info] Medicine (2 matching dictionaries) Optical Illusions: Medical Dictionary [home, info] optical illusions: online medical dictionary [home, info] Slang (1 matching dictionary) Optical illusions: Street Terms: Drugs and the Drug Trade [home, info]