cho ‧ les ‧ te ‧ rol /kəˈlestərɒl $ -roʊl/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: Greek ; Origin: chole ( ⇨ ↑ choler ) + stereos 'solid' + English -ol 'chemical compound' ]
a chemical substance found in your blood. Too much cholesterol in your body may cause heart disease.