Englishfor English speakers
und
noun
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(obsolete, rare) A wave.
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(heraldry) A billow- or wave-like marking.
Klein
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noun
United States fashion designer noted for understated fashions (born in 1942)
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noun
German mathematician who created the Klein bottle (1849-1925)
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noun
United States psychoanalyst (born in Austria) who was the first to specialize in the psychoanalysis of small children (1882-1960)