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Noun, pl. lemnisci (Zoology) 1. One of two oval bodies hanging from the interior walls of the body in the Acanthocephala. ( (Anatomy) 1. A part of the brain, such as the medial lemniscus or lateral lemniscus. ( 2. A bundle of sensory nerve fibers going to the thalamus. ( 3. A bundle of secondary sensory fibers within the brain stem which terminates in specific relay nuclei of the diencephalon. ( Word origin: From Late Latin lemniscus “a pendent ribbon.” from Greek lemniskos “woolen ribbon,” perhaps originally or literally “of Lemnos,” island in the...

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