| 单词 | cholesterol |
| 释义 | cholesterol (once / 3353 pages) n Cholesterol is a naturally-occurring steroid found in animal tissues. It's important for healthy cell membranes and other functions, but its waxy makeup makes it a danger as a high concentration could build up and block arteries. Cholesterol is a product of the liver, excreted through bile into the digestive tract. The first notice of cholesterol was in 1769, when a French researcher found it in gallstones. Then, in the early 19th Century the chemical was named "cholestrine," from the Greek words for bile (chole) and solids (stereos), plus the chemical suffix -ol. Scientists have noted the role of cholesterol in heart attacks and other health problems, a situation that can be regulated through diet or medications. WORD FAMILYcholesterol: cholesterols USAGE EXAMPLESOne theory ties high cholesterol to the development of the plaque deposits in the brain that are a hallmark of the memory-destroying disease. Washington Post(Dec 16, 2016) His cholesterol was also a little high, something they’d discussed that day. New York Times(Dec 08, 2016) One of bile’s main components is bile acid, a derivative of cholesterol. Economist(Dec 01, 2016) n an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues Syn|Hypo|Hyper cholesterin HDL cholesterol the cholesterol in high-density lipoproteins; the `good' cholesterol; a high level in the blood is thought to lower the risk of coronary artery disease LDL cholesterolthe cholesterol in low-density lipoproteins; the `bad' cholesterol; a high level in the blood is thought to be related to various pathogenic conditions oxidized LDL cholesterolLDL cholesterol that has been bombarded by free radicals; it is thought to cause atherosclerosis steroid alcohol, sterol any of a group of natural steroid alcohols derived from plants or animals; they are waxy insoluble substances |
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