Webster's English Dictionary

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cholesterol

cho.les.ter.ol \k*-'les-t*-.ro.l, -.ro-l\ n [F chole`sterine, fr. chol- + 
   Gk stereos solid] : a steroid alcohol C27H45OH present in animal cells and 
   body  fluids, important in physiological processes, and implicated 
   experimentally as a factor in arteriosclerosis