LDL

noun

ˌel-(ˌ)dē-ˈel 

: a lipoprotein of blood plasma that is composed of a moderate proportion of protein with little triglyceride and a high proportion of cholesterol and that is associated with increased probability of developing atherosclerosis : bad cholesterol compare hdl

Examples of LDL in a Sentence

Recent Examples on the Web

Fiber alone can slow digestion, improve blood sugar control, and help lower LDL cholesterol, all of which can benefit cardiometabolic health. — Lauren Manaker Ms, HEALTH, 18 Sep. 2026

This is noteworthy because high levels of triglycerides and LDL cholesterol can cause arterial blockages, potentially leading to heart disease. — Kirsten Nunez, Martha Stewart, 12 Sep. 2026

Medications available today can already lower LDL cholesterol to the levels found in the study. — Sandee Lamotte, CNN Money, 28 Aug. 2026

The main cholesterol and blood fat names to pay attention to are LDL, HDL, and triglycerides. — Gavin Escott, USA Today, 13 Aug. 2026

Word History

Etymology

low-density lipoprotein

First Known Use

1962, in the meaning defined above

Medical Definition

LDL

noun

ˈel-ˈdē-ˈel 

: a lipoprotein of blood plasma that is composed of a moderate proportion of protein with little triglyceride and a high proportion of cholesterol and that is associated with increased probability of developing atherosclerosis

called also bad cholesterol, beta-lipoprotein, low-density lipoprotein

compare hdl, vldl