Webster's English Dictionary

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mongolism

mon.gol.ism or mon.go.lian.ism \'ma:n-g*-.liz-*m\ \ma:n-'go-l-y*-.niz-*m, 
   ma:n-, -'go--le--*-.niz-\ n : a congenital idiocy of unknown ultimate cause 
   in which a child is born w ith slanting eyes, a broad short skull, and 
   broad hands with short fingers