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in·ter·nu·cle·ar .int-ər-'n(y)ü-klē-ər adj situated or occurring between atomic or biological nuclei
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in·ter·nu·cle·ar (in″tər-nooґkle-ər) 1. pertaining to or affecting structures between nuclei, as internuclear ophthalmoplegia. 2. between the nuclear layers of the retina.Medical dictionary. 2011.