abnormal triglyceride level decreased triglyceride level reduced concentration of naturally occurring esters of three fatty acids and glycerol; triglycerides are widespread in adipose tissue, commonly circulate in the blood in the form of lipoproteins, and are involved in the process of bidirectional transference of adipose fat and blood glucose with the liver reduced triglyceride level MP:0005318 MPheno.ontology low triglyceride level