HDL - definition and synonyms

noun [uncountable] biology 

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/ˌeɪtʃ diː ˈel /
  1. high-density lipoprotein: a type of cholesterol that carries harmful cholesterol away from your arteries and back to your liver, helping to prevent heart disease; also called This meaning is based on one submitted to the Open Dictionary by: Caleb Judy from United States on 15/07/2015