/nee"meuhn pik"/ , Pathol.
a rare, hereditary lipid-storage disease, occurring primarily among Ashkenazic Jews, in which abnormal lipid metabolism results in enlargement of the liver, spleen, and lymph nodes, and in progressive mental and physical deterioration.
[ described independently by German physicians Albert Niemann (1880-1921) in 1914 and Ludwig Pick (1868-1935?) in 1926 ]