LDL (low-density lipoprotein) is often referred to as the "bad" cholesterol as it can increase the risk of heart disease and stroke. There are several synonyms for LDL, including low-density lipoprotein cholesterol and LDL-C. Other terms that may be used to describe LDL include "cholesterol particles," "cholesterol molecules," and "lipoproteins." Some people also refer to LDL as "artery-clogging cholesterol" due to its potential to build up in the arteries and lead to blockages. It is important to keep LDL levels within a healthy range through lifestyle changes, such as a healthy diet and regular exercise, and medication if necessary.