an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues
"The liver continuously synthesizes cholesterol, which serves as the most abundant steroid found throughout animal tissues."
A sterol lipid synthesized by the liver and transported in the bloodstream to the membranes of all animal cells; it plays a central role in many biochemical processes and, as a lipoprotein that coats the walls of blood vessels, is associated with cardiovascular disease.
"High levels of cholesterol synthesized by the liver can accumulate on blood vessel walls, increasing the risk of cardiovascular disease."
In plain English: Cholesterol is a waxy substance found in your blood that helps build cells but can cause problems if you have too much of it.
"The doctor told him to eat less fatty food because his cholesterol levels were too high."
Usage: Cholesterol is often discussed alongside triglycerides, but unlike fats that provide energy, this waxy substance builds cell membranes. High levels can lead to plaque buildup in arteries, making diet and exercise key factors for managing heart health risks.
The word cholesterol was borrowed directly into English from French. It originally combined Greek roots meaning "bile stone," reflecting its early association with bile deposits found in the body.