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hallucination

hallucination A hallucination is a sensory experience that seems real even though no external stimulus is present.

A hallucination is a sensory experience that seems real even though no external stimulus is present. Unlike an illusion, which is a mistaken interpretation of something real, a hallucination occurs without anything outside the person causing the perception.

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Sources

Drafting source: NCI Thesaurus. Flat export snapshot 2026-10-18. “Hallucination” (C37961).
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PsychTerms (psychterms.org), CC BY 4.0, version 1. “hallucination.” Development preview.

Version 1 · SHA-256: 02fe10a42dafb7bc952faa173e1bff21832b431b997af7a0c04f59a13df06637

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