Lipoidaemia, also known as hyperlipidemia, is a medical condition characterized by elevated levels of lipids (fats) in the blood. It is a risk factor for the development of atherosclerosis and other cardiovascular diseases. There are several synonymous terms that describe this condition, including dyslipidemia, hyperlipoproteinemia, and lipidemia. Dyslipidemia is a broader term that encompasses abnormalities in lipid metabolism, including elevated levels of low-density lipoprotein (LDL) cholesterol and triglycerides, as well as low levels of high-density lipoprotein (HDL) cholesterol. Hyperlipoproteinemia specifically refers to elevated levels of lipoprotein particles, which are responsible for transporting lipids in the blood. Lipidemia is a term used to describe high lipid levels in the blood.