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

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

The results showed that the increase in CETP preceded the increase in LDL cholesterol. — Amber Raiken, Verywell Health, 12 Aug. 2026

The risk posed by LDL particles is typically higher in people with abdominal obesity, according to researchers. — Michele Laufik, Martha Stewart, 10 Aug. 2026

Many adults currently have LDL levels that are too high, according to the new goals. — Tom Gavin, EverydayHealth.com, 21 July 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